workflows/cachix: some more advanced waiting

i hope this works i have no idea why git-crypt does this it also happens
on local computers sometimes jalsdfjasoigrjoi

.github/workflows/cachix.yml

@@ -18,7 +18,17 @@ jobs:
           GIT_CRYPT_KEY: ${{ secrets.GIT_CRYPT_KEY }}
       - name: Wait..
         run:
-          sleep 20;
+          for s in {1..10}; do
+            nix eval .#checks.x86_64-linux.is_dirty;
+            if [ $? -eq 0 ]; then
+              break;
+            else
+              if [ $s -eq 10 ]; then
+                exit 1
+              fi
+              sleep 5;
+            fi
+          done
       - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v14
         with: