diff --git a/apps/web/src/projectScripts.test.ts b/apps/web/src/projectScripts.test.ts
index 3180e793ef11ace0785c6d766a0555dee5df5783..3dad5824ab577f1a05c95b0eb59418f6b493ba88 100644
--- a/apps/web/src/projectScripts.test.ts
+++ b/apps/web/src/projectScripts.test.ts
@@ -40,7 +40,7 @@ describe("projectScripts helpers", () => {
       { T3CODE_PROJECT_ROOT: '%USERPROFILE%^"repo"' },
       "Win32",
     );
-    expect(command).toBe('set "T3CODE_PROJECT_ROOT=%%USERPROFILE%%^^""repo""" && bun install');
+    expect(command).toBe('set "T3CODE_PROJECT_ROOT=^%USERPROFILE^%^^""repo""" && bun install');
   });
 
   it("resolves primary and setup scripts", () => {
diff --git a/apps/web/src/projectScripts.ts b/apps/web/src/projectScripts.ts
index d093138a667104a9656f0dd1735d678e3bfb2490..e7086a2f7a2527c47bce7fb78a531f62dae9247c 100644
--- a/apps/web/src/projectScripts.ts
+++ b/apps/web/src/projectScripts.ts
@@ -57,7 +57,7 @@ function shellEscapePosix(value: string): string {
 }
 
 function shellEscapeWindowsSetValue(value: string): string {
-  return value.replace(/\^/g, "^^").replace(/%/g, "%%").replace(/"/g, '""');
+  return value.replace(/\^/g, "^^").replace(/%/g, "^%").replace(/"/g, '""');
 }
 
 export function injectEnvIntoShellCommand(