diff --git a/apps/server/scripts/cli.ts b/apps/server/scripts/cli.ts
index e5b5c0d00a..3eaa72ea8e 100644
--- a/apps/server/scripts/cli.ts
+++ b/apps/server/scripts/cli.ts
@@ -132,6 +132,7 @@ const buildCmd = Command.make(
           cwd: serverDir,
           stdout: config.verbose ? "inherit" : "ignore",
           stderr: "inherit",
+          // Windows needs shell mode to resolve .cmd shims (e.g. bun.cmd).
           shell: process.platform === "win32",
         })`bun tsdown`,
       );
@@ -226,6 +227,7 @@ const publishCmd = Command.make(
                 cwd: serverDir,
                 stdout: config.verbose ? "inherit" : "ignore",
                 stderr: "inherit",
+                // Windows needs shell mode to resolve .cmd shims.
                 shell: process.platform === "win32",
               }),
             );
diff --git a/scripts/build-desktop-artifact.ts b/scripts/build-desktop-artifact.ts
index 8823b88513..c44109faea 100644
--- a/scripts/build-desktop-artifact.ts
+++ b/scripts/build-desktop-artifact.ts
@@ -580,6 +580,8 @@ const buildDesktopArtifact = Effect.fn("buildDesktopArtifact")(function* (
       ChildProcess.make({
         cwd: repoRoot,
         ...commandOutputOptions(options.verbose),
+        // Windows needs shell mode to resolve .cmd shims (e.g. bun.cmd).
+        shell: process.platform === "win32",
       })`bun run build:desktop`,
     );
   }
@@ -642,6 +644,8 @@ const buildDesktopArtifact = Effect.fn("buildDesktopArtifact")(function* (
     ChildProcess.make({
       cwd: stageAppDir,
       ...commandOutputOptions(options.verbose),
+      // Windows needs shell mode to resolve .cmd shims (e.g. bun.cmd).
+      shell: process.platform === "win32",
     })`bun install --production`,
   );
 
@@ -680,6 +684,8 @@ const buildDesktopArtifact = Effect.fn("buildDesktopArtifact")(function* (
       cwd: stageAppDir,
       env: buildEnv,
       ...commandOutputOptions(options.verbose),
+      // Windows needs shell mode to resolve .cmd shims.
+      shell: process.platform === "win32",
     })`bunx electron-builder ${platformConfig.cliFlag} --${options.arch} --publish never`,
   );
 
diff --git a/scripts/dev-runner.ts b/scripts/dev-runner.ts
index c72411e318..89d7a104cf 100644
--- a/scripts/dev-runner.ts
+++ b/scripts/dev-runner.ts
@@ -455,6 +455,8 @@ export function runDevRunnerWithInput(input: DevRunnerCliInput) {
         stderr: "inherit",
         env,
         extendEnv: false,
+        // Windows needs shell mode to resolve .cmd shims (e.g. bun.cmd).
+        shell: process.platform === "win32",
         // Keep turbo in the same process group so terminal signals (Ctrl+C)
         // reach it directly. Effect defaults to detached: true on non-Windows,
         // which would put turbo in a new group and require manual forwarding.