flake: refactor packages to fit expectations

.github/workflows/CI.yml

@@ -23,14 +23,14 @@ jobs:
     - name: Maximize build space
       uses: AdityaGarg8/remove-unwanted-software@master
       with:
-       remove-android: 'true'
-       remove-dotnet: 'true'
-       remove-haskell: 'true'
-       remove-codeql: 'true'
-       remove-docker-images: 'true'
-       remove-large-packages: 'true'
-       remove-cached-tools: 'true'
-       remove-swapfile: 'true'
+        remove-android: 'true'
+        remove-dotnet: 'true'
+        remove-haskell: 'true'
+        remove-codeql: 'true'
+        remove-docker-images: 'true'
+        remove-large-packages: 'true'
+        remove-cached-tools: 'true'
+        remove-swapfile: 'true'
     - name: Checkout
       uses: actions/checkout@v4
     - name: "Install Nix"
@@ -47,8 +47,8 @@ jobs:
       env:
         GC_DONT_GC: 1
       run: |
-        for output in $(nix flake show --json | nix run nixpkgs#jq -- -r 'keys[]'); do
-          nix build .#$output --accept-flake-config
+        for output in $(nix flake show --json | nix run nixpkgs#jq -- -r '.packages."x86_64-linux" | keys[]'); do
+          nix build .#packages.x86_64-linux.${output} --accept-flake-config
           if [ $(du -B1M result/iso/*.iso | cut -f1) -gt 2000 ]; then
             split -d result/iso/*.iso -b 2000M nixos-$output.iso.part-
           else