mode=xcode: Only cache CompilationCache directory.

Caching ModuleCache is not safe across runs on different machines/baseimages.

Author: nichtverstehen

dist/index/index.js

@@ -29900,7 +29900,7 @@ async function resolveCacheMode(cacheMode, cachesXcode) {
             return [
                 {
                     // Consider: `defaults read com.apple.dt.Xcode.plist IDECustomDerivedDataLocation`
-                    mountTarget: "~/Library/Developer/Xcode/DerivedData",
+                    mountTarget: "~/Library/Developer/Xcode/DerivedData/CompilationCache.noindex",
                     framework: cacheMode,
                 },
             ];

src/index.ts

@@ -301,7 +301,7 @@ async function resolveCacheMode(
       return [
         {
           // Consider: `defaults read com.apple.dt.Xcode.plist IDECustomDerivedDataLocation`
-          mountTarget: "~/Library/Developer/Xcode/DerivedData",
+          mountTarget: "~/Library/Developer/Xcode/DerivedData/CompilationCache.noindex",
           framework: cacheMode,
         },
       ];