e11-static: contain `e11sync-static`

TODO: learn about `lib.makeScope`.

flake.nix

@@ -53,9 +53,7 @@
         inherit geoip2-tarball;
       };
 
-      e11sync-static = pkgs.callPackage ./pkgs/e11sync-static.nix {
-        inherit e11sync-static;
-      };
+      e11sync-static = pkgs.callPackage ./pkgs/e11sync-static.nix {};
 
       e11sync-frontend = pkgs.callPackage ./pkgs/e11sync-frontend.nix {
         inherit e11sync-static;

pkgs/e11sync-static.nix

@@ -8,38 +8,39 @@
   findutils,
   dart-sass,
   gawk,
-  e11sync-static,
-}:
-stdenv.mkDerivation {
-  name = "e11sync-static";
-  src = ../app;
-  nativeBuildInputs = [
-    python3Packages.django
-    python3Packages.django-compressor
-    dart-sass
-    zopfli
-    brotli
-  ];
-  patchPhase = ''patchShebangs --build manage.py'';
-  buildPhase = ''
-    mkdir -p static
-    export E11SYNC_STATIC_ROOT=static
-    export E11SYNC_DEBUG=
-    export E11SYNC_COMPRESS_OFFLINE=1
-    ./manage.py collectstatic
-    ./manage.py compress
+}: let
+  self = stdenv.mkDerivation {
+    name = "e11sync-static";
+    src = ../app;
+    nativeBuildInputs = [
+      python3Packages.django
+      python3Packages.django-compressor
+      dart-sass
+      zopfli
+      brotli
+    ];
+    patchPhase = ''patchShebangs --build manage.py'';
+    buildPhase = ''
+      mkdir -p static
+      export E11SYNC_STATIC_ROOT=static
+      export E11SYNC_DEBUG=
+      export E11SYNC_COMPRESS_OFFLINE=1
+      ./manage.py collectstatic
+      ./manage.py compress
 
-    ${findutils}/bin/find static/ \
-        -name '*.css' -or \
-        -name '*.js' -or \
-        -name '*.svg' | \
-        ${gawk}/bin/awk '{print "zopfli "$0;print "brotli "$0}' | \
-        ${findutils}/bin/xargs -P''$(${coreutils}/bin/nproc) -I{} $SHELL -c {}
-  '';
-  installPhase = ''mv static $out'';
+      ${findutils}/bin/find static/ \
+          -name '*.css' -or \
+          -name '*.js' -or \
+          -name '*.svg' | \
+          ${gawk}/bin/awk '{print "zopfli "$0;print "brotli "$0}' | \
+          ${findutils}/bin/xargs -P''$(${coreutils}/bin/nproc) -I{} $SHELL -c {}
+    '';
+    installPhase = ''mv static $out'';
 
-  passthru.manifest = runCommand "e11sync-static-manifest" {} ''
-    mkdir -p $out/CACHE
-    cp ${e11sync-static}/CACHE/manifest.json $out/CACHE/
-  '';
-}
+    passthru.manifest = runCommand "e11sync-static-manifest" {} ''
+      mkdir -p $out/CACHE
+      cp ${self}/CACHE/manifest.json $out/CACHE/
+    '';
+  };
+in
+  self