Update build-sm64.yml

.github/workflows/build-sm64.yml

@@ -13,19 +13,22 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v4
 
+      - name: Install Nix
+        run: |
+          sh <(curl -L https://nixos.org/nix/install) --daemon
+          . /home/runner/.nix-profile/etc/profile.d/nix.sh
+
       - name: Set Up Devenv
         run: |
-          curl -L https://nixos.org/nix/install | sh
-          nix-env -iA nixpkgs.devenv
-          cp devenv.nix /root/.config/devenv/ # Copy devenv.nix to the expected location
-          cp devenv.yaml /root/.config/devenv/ # Copy devenv.yaml to the expected location
+          nix-env --install --attr devenv -f https://github.com/NixOS/nixpkgs/tarball/nixpkgs-unstable
+          cp devenv.nix /root/.config/devenv/
+          cp devenv.yaml /root/.config/devenv/
           devenv up
 
       - name: Install Android Emulator (AArch64 & ARMv7)
         run: |
           sdkmanager --install "system-images;android-32;google_apis;arm64-v8a"
           sdkmanager --install "system-images;android-25;default;armeabi-v7a"
-          
           avdmanager create avd --force --name my-android-emulator-aarch64 --package "system-images;android-32;google_apis;arm64-v8a"
           avdmanager create avd --force --name my-android-emulator-armv7 --package "system-images;android-25;default;armeabi-v7a"
           echo "Android emulators set up successfully"