let's try CI images again

flake.lock

@@ -157,6 +157,22 @@
         "url": "https://install.determinate.systems/determinate-nixd/tag/v3.17.0/x86_64-linux"
       }
     },
+    "docker-nixpkgs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1764690098,
+        "narHash": "sha256-dCcMzcKlI9hB0EL2/odCyrouVKHmi9m/K2awJGho3oc=",
+        "owner": "nix-community",
+        "repo": "docker-nixpkgs",
+        "rev": "10b83cdcf12c7d37db50cd8d2c68b336881b91de",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "docker-nixpkgs",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -629,6 +645,7 @@
         "dart": "dart",
         "deploy-rs": "deploy-rs",
         "determinate": "determinate",
+        "docker-nixpkgs": "docker-nixpkgs",
         "home-manager": "home-manager",
         "jj-nvim": "jj-nvim",
         "jj-vine": "jj-vine",