Use singular nouns when appropriate on install messages (#2543)

* Use singular nouns when appropriate on install messages

* Fix one more pluralization

* Fix bun-add tests for "1 package installed"

* Fix bun install/remove/update tests for "1 package installed"

6 files changed, 102 insertions, 98 deletions

diff --git a/src/install/install.zig b/src/install/install.zig
index 83e060e07..abac43493 100644
--- a/src/install/install.zig
+++ b/src/install/install.zig
@@ -5989,11 +5989,11 @@ pub const PackageManager = struct {
         clap.parseParam("-D, --development") catch unreachable,
         clap.parseParam("--optional                        Add dependency to \"optionalDependencies\"") catch unreachable,
         clap.parseParam("-E, --exact                  Add the exact version instead of the ^range") catch unreachable,
-        clap.parseParam("<POS> ...                         \"name\" or \"name@version\" of packages to install") catch unreachable,
+        clap.parseParam("<POS> ...                         \"name\" or \"name@version\" of package(s) to install") catch unreachable,
     };
 
     const remove_params = install_params_ ++ [_]ParamType{
-        clap.parseParam("<POS> ...                         \"name\" of packages to remove from package.json") catch unreachable,
+        clap.parseParam("<POS> ...                         \"name\" of package(s) to remove from package.json") catch unreachable,
     };
 
     const link_params = install_params_ ++ [_]ParamType{
@@ -8086,13 +8086,14 @@ pub const PackageManager = struct {
 
                 if (install_summary.success > 0) {
                     // it's confusing when it shows 3 packages and says it installed 1
-                    Output.pretty("\n <green>{d}<r> packages<r> installed ", .{@max(
+                    const pkgs_installed = @max(
                         install_summary.success,
                         @as(
                             u32,
                             @truncate(manager.package_json_updates.len),
                         ),
-                    )});
+                    );
+                    Output.pretty("\n <green>{d}<r> package{s}<r> installed ", .{ pkgs_installed, if (pkgs_installed == 1) "" else "s" });
                     Output.printStartEndStdout(ctx.start_time, std.time.nanoTimestamp());
                     printed_timestamp = true;
                     Output.pretty("<r>\n", .{});
@@ -8107,7 +8108,7 @@ pub const PackageManager = struct {
                         }
                     }
 
-                    Output.pretty("\n <r><b>{d}<r> packages removed ", .{manager.summary.remove});
+                    Output.pretty("\n <r><b>{d}<r> package{s} removed ", .{ manager.summary.remove, if (manager.summary.remove == 1) "" else "s" });
                     Output.printStartEndStdout(ctx.start_time, std.time.nanoTimestamp());
                     printed_timestamp = true;
                     Output.pretty("<r>\n", .{});
@@ -8116,16 +8117,19 @@ pub const PackageManager = struct {
 
                     const count = @as(PackageID, @truncate(manager.lockfile.packages.len));
                     if (count != install_summary.skipped) {
-                        Output.pretty("Checked <green>{d} installs<r> across {d} packages <d>(no changes)<r> ", .{
+                        Output.pretty("Checked <green>{d} install{s}<r> across {d} package{s} <d>(no changes)<r> ", .{
                             install_summary.skipped,
+                            if (install_summary.skipped == 1) "" else "s",
                             count,
+                            if (count == 1) "" else "s",
                         });
                         Output.printStartEndStdout(ctx.start_time, std.time.nanoTimestamp());
                         printed_timestamp = true;
                         Output.pretty("<r>\n", .{});
                     } else {
-                        Output.pretty("<r> <green>Done<r>! Checked {d} packages<r> <d>(no changes)<r> ", .{
+                        Output.pretty("<r> <green>Done<r>! Checked {d} package{s}<r> <d>(no changes)<r> ", .{
                             install_summary.skipped,
+                            if (install_summary.skipped == 1) "" else "s",
                         });
                         Output.printStartEndStdout(ctx.start_time, std.time.nanoTimestamp());
                         printed_timestamp = true;
@@ -8134,7 +8138,7 @@ pub const PackageManager = struct {
                 }
 
                 if (install_summary.fail > 0) {
-                    Output.prettyln("<r>Failed to install <red><b>{d}<r> packages\n", .{install_summary.fail});
+                    Output.prettyln("<r>Failed to install <red><b>{d}<r> package{s}\n", .{ install_summary.fail, if (install_summary.fail == 1) "" else "s" });
                     Output.flush();
                 }
             }
diff --git a/test/cli/install/bun-add.test.ts b/test/cli/install/bun-add.test.ts
index 3e3e919c3..62f5cc6cc 100644
--- a/test/cli/install/bun-add.test.ts
+++ b/test/cli/install/bun-add.test.ts
@@ -69,7 +69,7 @@ it("should add existing package", async () => {
     ` installed foo@${add_path}`,
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(await file(join(package_dir, "package.json")).text()).toEqual(
@@ -278,7 +278,7 @@ it("should add dependency with capital letters", async () => {
     " installed BaR@0.0.2",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/BaR`, `${root_url}/BaR-0.0.2.tgz`]);
@@ -333,7 +333,7 @@ it("should add exact version", async () => {
     " installed BaR@0.0.2",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/BaR`, `${root_url}/BaR-0.0.2.tgz`]);
@@ -388,7 +388,7 @@ it("should add exact version with -E", async () => {
     " installed BaR@0.0.2",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/BaR`, `${root_url}/BaR-0.0.2.tgz`]);
@@ -452,7 +452,7 @@ it("should add dependency with specified semver", async () => {
     "  - baz-run",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -513,7 +513,7 @@ it("should add dependency (GitHub)", async () => {
     "  - uglifyjs",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -673,7 +673,7 @@ it("should add aliased dependency (npm)", async () => {
     "  - baz-run",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -734,7 +734,7 @@ it("should add aliased dependency (GitHub)", async () => {
     "  - uglifyjs",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -818,7 +818,7 @@ it("should let you add the same package twice", async () => {
     " installed baz@0.0.3",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -933,7 +933,7 @@ it("should install version tagged with `latest` by default", async () => {
     " installed baz@0.0.3",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -983,7 +983,7 @@ it("should install version tagged with `latest` by default", async () => {
   expect(out2.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + baz@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -1047,7 +1047,7 @@ it("should handle Git URL in dependencies (SCP-style)", async () => {
     "  - uglifyjs",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -1107,7 +1107,7 @@ it("should handle Git URL in dependencies (SCP-style)", async () => {
   const out2 = await new Response(stdout2).text();
   expect(out2.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     "",
-    "Checked 1 installs across 2 packages (no changes)",
+    "Checked 1 install across 2 packages (no changes)",
   ]);
   expect(await exited2).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -1266,7 +1266,7 @@ it("should add dependency without duplication", async () => {
     " installed bar@0.0.2",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1367,7 +1367,7 @@ it("should add dependency without duplication (GitHub)", async () => {
     "  - uglifyjs",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(await readdirSorted(join(package_dir, "node_modules"))).toEqual([".bin", ".cache", "uglify-js"]);
@@ -1505,7 +1505,7 @@ it("should add dependencies to workspaces directly", async () => {
     ` installed foo@${relative(package_dir, add_dir)}`,
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(await readdirSorted(join(package_dir))).toEqual([
@@ -1568,7 +1568,7 @@ async function installRedirectsToAdd(saveFlagFirst: boolean) {
     ` installed foo@${add_path}`,
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(await file(join(package_dir, "package.json")).text()).toInclude("bun-add.test");
@@ -1605,7 +1605,7 @@ it("should add dependency alongside peerDependencies", async () => {
     " installed bar@0.0.2",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1660,7 +1660,7 @@ it("should add local tarball dependency", async () => {
     "  - baz-run",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
diff --git a/test/cli/install/bun-install.test.ts b/test/cli/install/bun-install.test.ts
index 8f922a0e0..6b0d313f9 100644
--- a/test/cli/install/bun-install.test.ts
+++ b/test/cli/install/bun-install.test.ts
@@ -192,7 +192,7 @@ it("should handle empty string in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -380,7 +380,7 @@ it("should handle `workspace:` specifier", async () => {
   expect(out1.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@workspace:path/to/bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(requested).toBe(0);
@@ -409,7 +409,7 @@ it("should handle `workspace:` specifier", async () => {
   expect(out2.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@workspace:path/to/bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(requested).toBe(0);
@@ -453,7 +453,7 @@ it("should handle workspaces with packages array", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -675,7 +675,7 @@ it("should ignore peerDependencies within workspaces", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Baz@workspace:packages/baz",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -727,7 +727,7 @@ it("should handle life-cycle scripts within workspaces", async () => {
     " + Bar@workspace:bar",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -784,7 +784,7 @@ it("should handle life-cycle scripts during re-installation", async () => {
     " + Bar@workspace:bar",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(requested).toBe(0);
@@ -816,7 +816,7 @@ it("should handle life-cycle scripts during re-installation", async () => {
     " + Bar@workspace:bar",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(requested).toBe(0);
@@ -848,7 +848,7 @@ it("should handle life-cycle scripts during re-installation", async () => {
     " + Bar@workspace:bar",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited3).toBe(0);
   expect(requested).toBe(0);
@@ -903,7 +903,7 @@ it("should use updated life-cycle scripts in root during re-installation", async
     " + Bar@workspace:bar",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(requested).toBe(0);
@@ -948,7 +948,7 @@ it("should use updated life-cycle scripts in root during re-installation", async
     "[scripts:run] Moo",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(requested).toBe(0);
@@ -982,7 +982,7 @@ it("should use updated life-cycle scripts in root during re-installation", async
     "[scripts:run] Moo",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited3).toBe(0);
   expect(requested).toBe(0);
@@ -1037,7 +1037,7 @@ it("should use updated life-cycle scripts in dependency during re-installation",
     " + Bar@workspace:bar",
     "[scripts:run] Foo",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(requested).toBe(0);
@@ -1081,7 +1081,7 @@ it("should use updated life-cycle scripts in dependency during re-installation",
     "[scripts:run] Foo",
     "[scripts:run] Bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(requested).toBe(0);
@@ -1115,7 +1115,7 @@ it("should use updated life-cycle scripts in dependency during re-installation",
     "[scripts:run] Foo",
     "[scripts:run] Bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited3).toBe(0);
   expect(requested).toBe(0);
@@ -1158,7 +1158,7 @@ it("should ignore workspaces within workspaces", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -1196,7 +1196,7 @@ it("should handle ^0 in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1276,7 +1276,7 @@ it("should handle ^0.0 in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1394,7 +1394,7 @@ it("should handle ^0.0.2 in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1438,7 +1438,7 @@ it("should handle ^0.0.2-rc in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2-rc",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1482,7 +1482,7 @@ it("should handle ^0.0.2-alpha.3+b4d in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2-alpha.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1570,7 +1570,7 @@ it("should handle ^0.0.2rc1 in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2-rc1",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1614,7 +1614,7 @@ it("should handle ^0.0.2_pre3 in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2-_pre3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1658,7 +1658,7 @@ it("should handle ^0.0.2b_4+cafe_b0ba in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2-b_4+cafe_b0ba",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1702,7 +1702,7 @@ it("should handle caret range in dependencies when the registry has prereleased
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@6.3.0",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -1759,7 +1759,7 @@ it("should prefer latest-tagged dependency", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + baz@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -1815,7 +1815,7 @@ it("should handle dependency aliasing", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -1871,7 +1871,7 @@ it("should handle dependency aliasing (versioned)", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -1927,7 +1927,7 @@ it("should handle dependency aliasing (dist-tagged)", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -1987,7 +1987,7 @@ it("should not reinstall aliased dependencies", async () => {
   expect(out1.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + Bar@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -2025,7 +2025,7 @@ it("should not reinstall aliased dependencies", async () => {
   const out2 = await new Response(stdout2).text();
   expect(out2.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     "",
-    "Checked 1 installs across 2 packages (no changes)",
+    "Checked 1 install across 2 packages (no changes)",
   ]);
   expect(await exited2).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -2238,7 +2238,7 @@ it("should handle unscoped alias on scoped dependency", async () => {
     " + @barn/moo@0.1.0",
     " + moo@0.1.0",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/@barn%2fmoo`, `${root_url}/@barn/moo-0.1.0.tgz`]);
@@ -2298,7 +2298,7 @@ it("should handle scoped alias on unscoped dependency", async () => {
     " + @baz/bar@0.0.2",
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -2493,7 +2493,7 @@ it("should handle GitHub URL in dependencies (user/repo)", async () => {
   let out = await new Response(stdout).text();
   out = out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "");
   out = out.replace(/(github:[^#]+)#[a-f0-9]+/, "$1");
-  expect(out.split(/\r?\n/)).toEqual([" + uglify@github:mishoo/UglifyJS", "", " 1 packages installed"]);
+  expect(out.split(/\r?\n/)).toEqual([" + uglify@github:mishoo/UglifyJS", "", " 1 package installed"]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
   expect(requested).toBe(0);
@@ -2547,7 +2547,7 @@ it("should handle GitHub URL in dependencies (user/repo#commit-id)", async () =>
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify@github:mishoo/UglifyJS#e219a9a",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -2613,7 +2613,7 @@ it("should handle GitHub URL in dependencies (user/repo#tag)", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify@github:mishoo/UglifyJS#e219a9a",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -2842,7 +2842,7 @@ it("should handle GitHub URL in dependencies (github:user/repo#tag)", async () =
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify@github:mishoo/UglifyJS#e219a9a",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -2910,7 +2910,7 @@ it("should handle GitHub URL in dependencies (https://github.com/user/repo.git)"
   let out = await new Response(stdout).text();
   out = out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "");
   out = out.replace(/(github:[^#]+)#[a-f0-9]+/, "$1");
-  expect(out.split(/\r?\n/)).toEqual([" + uglify@github:mishoo/UglifyJS", "", " 1 packages installed"]);
+  expect(out.split(/\r?\n/)).toEqual([" + uglify@github:mishoo/UglifyJS", "", " 1 package installed"]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
   expect(requested).toBe(0);
@@ -2964,7 +2964,7 @@ it("should handle GitHub URL in dependencies (git://github.com/user/repo.git#com
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify@github:mishoo/UglifyJS#e219a9a",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -3032,7 +3032,7 @@ it("should handle GitHub URL in dependencies (git+https://github.com/user/repo.g
   let out = await new Response(stdout).text();
   out = out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "");
   out = out.replace(/(github:[^#]+)#[a-f0-9]+/, "$1");
-  expect(out.split(/\r?\n/)).toEqual([" + uglify@github:mishoo/UglifyJS", "", " 1 packages installed"]);
+  expect(out.split(/\r?\n/)).toEqual([" + uglify@github:mishoo/UglifyJS", "", " 1 package installed"]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
   expect(requested).toBe(0);
@@ -3088,7 +3088,7 @@ it("should handle GitHub tarball URL in dependencies (https://github.com/user/re
   expect(out.split(/\r?\n/)).toEqual([
     " + when@https://github.com/cujojs/when/tarball/1.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -3147,7 +3147,7 @@ it("should handle GitHub tarball URL in dependencies (https://github.com/user/re
   expect(out.split(/\r?\n/)).toEqual([
     " + when@https://github.com/cujojs/when/tarball/1.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -3430,7 +3430,7 @@ it("should not regard peerDependencies declarations as duplicates", async () =>
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -3672,7 +3672,7 @@ it("should handle Git URL in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify-js@git+https://git@github.com/mishoo/UglifyJS.git",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -3733,7 +3733,7 @@ it("should handle Git URL in dependencies (SCP-style)", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify@git+ssh://github.com:mishoo/UglifyJS.git",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -3792,7 +3792,7 @@ it("should handle Git URL with committish in dependencies", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + uglify@git+https://git@github.com/mishoo/UglifyJS.git#e219a9a78a0d2251e4dcbd4bb9034207eb484fe8",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -3935,7 +3935,7 @@ it("should de-duplicate committish in Git URLs", async () => {
     " + uglify-hash@git+https://git@github.com/mishoo/UglifyJS.git#e219a9a78a0d2251e4dcbd4bb9034207eb484fe8",
     " + uglify-ver@git+https://git@github.com/mishoo/UglifyJS.git#e219a9a78a0d2251e4dcbd4bb9034207eb484fe8",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -4223,7 +4223,7 @@ it("should prefer optionalDependencies over dependencies of the same name", asyn
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + baz@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -4276,7 +4276,7 @@ it("should prefer dependencies over peerDependencies of the same name", async ()
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + baz@0.0.5",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.5.tgz`]);
@@ -4321,7 +4321,7 @@ it("should handle tarball URL", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     ` + baz@${root_url}/baz-0.0.3.tgz`,
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz-0.0.3.tgz`]);
@@ -4369,7 +4369,7 @@ it("should handle tarball path", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     ` + baz@${join(import.meta.dir, "baz-0.0.3.tgz")}`,
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -4416,7 +4416,7 @@ it("should handle tarball URL with aliasing", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     ` + bar@${root_url}/baz-0.0.3.tgz`,
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz-0.0.3.tgz`]);
@@ -4464,7 +4464,7 @@ it("should handle tarball path with aliasing", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     ` + bar@${join(import.meta.dir, "baz-0.0.3.tgz")}`,
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -5091,7 +5091,7 @@ it("should ignore invalid workspaces from parent directory", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -5147,7 +5147,7 @@ it("should handle --cwd", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@0.0.2",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/bar`, `${root_url}/bar-0.0.2.tgz`]);
@@ -5510,7 +5510,7 @@ it("should handle `workspaces:*` and `workspace:*` gracefully", async () => {
   expect(out1.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(requested).toBe(0);
@@ -5540,7 +5540,7 @@ it("should handle `workspaces:*` and `workspace:*` gracefully", async () => {
   expect(out2.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(requested).toBe(0);
@@ -5583,7 +5583,7 @@ it("should handle `workspaces:bar` and `workspace:*` gracefully", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -5626,7 +5626,7 @@ it("should handle `workspaces:*` and `workspace:bar` gracefully", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -5669,7 +5669,7 @@ it("should handle `workspaces:bar` and `workspace:bar` gracefully", async () =>
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(requested).toBe(0);
@@ -6265,7 +6265,7 @@ it("should override npm dependency by matching workspace", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:bar",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -6355,7 +6355,7 @@ it("should override @scoped npm dependency by matching workspace", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + @bar/baz@workspace:packages/bar-baz",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
@@ -6404,7 +6404,7 @@ it("should override aliased npm dependency by matching workspace", async () => {
   expect(out.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + bar@workspace:baz",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited).toBe(0);
   expect(urls.sort()).toBeEmpty();
diff --git a/test/cli/install/bun-link.test.ts b/test/cli/install/bun-link.test.ts
index 39872b072..5d2fffc39 100644
--- a/test/cli/install/bun-link.test.ts
+++ b/test/cli/install/bun-link.test.ts
@@ -85,7 +85,7 @@ it("should link package", async () => {
     ` installed ${link_name}@link:${link_name}`,
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
 
@@ -186,7 +186,7 @@ it("should link scoped package", async () => {
     ` installed ${link_name}@link:${link_name}`,
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
 
@@ -292,7 +292,7 @@ it("should link dependency without crashing", async () => {
   expect(out2.replace(/\s*\[[0-9\.]+ms\]\s*$/, "").split(/\r?\n/)).toEqual([
     ` + ${link_name}@link:${link_name}`,
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(await readdirSorted(join(package_dir, "node_modules"))).toEqual([".bin", ".cache", link_name].sort());
@@ -341,6 +341,6 @@ it("should link dependency without crashing", async () => {
   expect(err4).toContain(`error: FileNotFound installing ${link_name}`);
   expect(stdout4).toBeDefined();
   const out4 = await new Response(stdout4).text();
-  expect(out4.replace(/\[[0-9\.]+m?s\]/, "[]").split(/\r?\n/)).toEqual(["Failed to install 1 packages", "[] done", ""]);
+  expect(out4.replace(/\[[0-9\.]+m?s\]/, "[]").split(/\r?\n/)).toEqual(["Failed to install 1 package", "[] done", ""]);
   expect(await exited4).toBe(0);
 });
diff --git a/test/cli/install/bun-remove.test.ts b/test/cli/install/bun-remove.test.ts
index 5b029f143..2b70900dd 100644
--- a/test/cli/install/bun-remove.test.ts
+++ b/test/cli/install/bun-remove.test.ts
@@ -102,7 +102,7 @@ it("should remove existing package", async () => {
   expect(out1.replace(/\s*\[[0-9\.]+m?s\]/, "").split(/\r?\n/)).toEqual([
     ` + pkg2@${pkg2_path}`,
     "",
-    " 1 packages installed",
+    " 1 package installed",
     "  Removed: 1",
     "",
   ]);
diff --git a/test/cli/install/bun-update.test.ts b/test/cli/install/bun-update.test.ts
index c7d4fdd85..7cdfb3a97 100644
--- a/test/cli/install/bun-update.test.ts
+++ b/test/cli/install/bun-update.test.ts
@@ -67,7 +67,7 @@ it("should update to latest version of dependency", async () => {
   expect(out1.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + baz@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited1).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.3.tgz`]);
@@ -113,7 +113,7 @@ it("should update to latest version of dependency", async () => {
     "  - baz-exec",
     "",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
   expect(await exited2).toBe(0);
   expect(urls.sort()).toEqual([`${root_url}/baz`, `${root_url}/baz-0.0.5.tgz`]);
@@ -296,7 +296,7 @@ it("lockfile should not be modified when there are no version changes, issue#588
   expect(out1.replace(/\s*\[[0-9\.]+m?s\]\s*$/, "").split(/\r?\n/)).toEqual([
     " + baz@0.0.3",
     "",
-    " 1 packages installed",
+    " 1 package installed",
   ]);
 
   // Test if the lockb has been modified by `bun update`.