fix: nix hash update parsing (#18979)

.github/workflows/nix-hashes.yml

@@ -56,7 +56,7 @@ jobs:
           nix build ".#packages.${SYSTEM}.node_modules_updater" --no-link 2>&1 | tee "$BUILD_LOG" || true
 
           # Extract hash from build log with portability
-          HASH="$(grep -oE 'got:\s*sha256-[A-Za-z0-9+/=]+' "$BUILD_LOG" | tail -n1 || true)"
+          HASH="$(grep -oP 'got:\s*\Ksha256-[A-Za-z0-9+/=]+' "$BUILD_LOG" | tail -n1 || true)"
 
           if [ -z "$HASH" ]; then
             echo "::error::Failed to compute hash for ${SYSTEM}"

nix/hashes.json

@@ -1,8 +1,8 @@
 {
   "nodeModules": {
-    "x86_64-linux": "got:sha256-nMERinypUtIZGfLlAS5meYrvH5tTl2SkdG3GUguhOos=",
-    "aarch64-linux": "got:sha256-aQ42YVcjXSxpweA3e0SfJ8mnMWEqGeIOKg1cIhn8szA=",
-    "aarch64-darwin": "got:sha256-OGtUfhKWTRqi8bYcqkvfb1RZa3iS0DVy5bbRry47Og4=",
-    "x86_64-darwin": "got:sha256-kdzsr67cGduvGl+4UVdngiKNCaVw88WeMgx1ckVbG30="
+    "x86_64-linux": "sha256-nMERinypUtIZGfLlAS5meYrvH5tTl2SkdG3GUguhOos=",
+    "aarch64-linux": "sha256-aQ42YVcjXSxpweA3e0SfJ8mnMWEqGeIOKg1cIhn8szA=",
+    "aarch64-darwin": "sha256-OGtUfhKWTRqi8bYcqkvfb1RZa3iS0DVy5bbRry47Og4=",
+    "x86_64-darwin": "sha256-kdzsr67cGduvGl+4UVdngiKNCaVw88WeMgx1ckVbG30="
   }
 }