feat: push to cachix

.github/workflows/release.yaml

@@ -22,13 +22,15 @@ jobs:
       uses: docker://nixos/nix
       with:
         args: >
-          nix
-          --extra-experimental-features flakes
-          --extra-experimental-features nix-command
-          --extra-substituters http://172.17.0.1:5000?trusted=1
-          build
-          --print-build-logs
+          bash -ec "
+            nix
+            --extra-experimental-features flakes
+            --extra-experimental-features nix-command
+            --extra-substituters http://172.17.0.1:5000?trusted=1
+            build
+            --print-build-logs
 
-    - name: Push
-      run: |
-        cachix push result
+            nix-env -iA cachix -f https://cachix.org/api/v1/install
+
+            cachix push --compression-level 9 alejandra result
+          "