diff --git a/Tasks/Yarn/yarnTask.ts b/Tasks/Yarn/yarnTask.ts
index 0e0b731..9247ae7 100644
--- a/Tasks/Yarn/yarnTask.ts
+++ b/Tasks/Yarn/yarnTask.ts
@@ -72,11 +72,16 @@ async function yarnExec() {
         tl.debug(yarnPath);
 
         let npmrc = util.getTempNpmrcPath();
-        fs.ensureFileSync(npmrc);
         let npmRegistries: INpmRegistry[] = await util.getLocalNpmRegistries(projectPath);
         let overrideNpmrc = fs.existsSync(projectNpmrc());
         let registryLocation = customRegistry;
 
+        if (overrideNpmrc) {
+            fs.copySync(projectNpmrc(), npmrc);
+        }
+
+        fs.ensureFileSync(npmrc);
+
         switch (registryLocation) {
             case RegistryLocation.Feed:
                 tl.debug("Using internal feed");