e11sync-static: patch sources correctly

pkgs/e11sync-static.nix

@@ -17,17 +17,18 @@ stdenv.mkDerivation {
     python3Packages.django-compressor
     dart-sass
   ];
+  patchPhase = ''patchShebangs --build app/manage.py'';
   buildPhase = ''
     mkdir -p static
     export E11SYNC_STATIC_ROOT=static
     export E11SYNC_DEBUG=
     export E11SYNC_COMPRESS_OFFLINE=1
-    ${python3}/bin/python3 ${self}/app/manage.py collectstatic
-    ${python3}/bin/python3 ${self}/app/manage.py compress
+    app/manage.py collectstatic
+    app/manage.py compress
 
     ${findutils}/bin/find static/CACHE -name '*.css' | \
-    ${findutils}/bin/xargs -P''$(${coreutils}/bin/nproc) -I{} sh -c \
-    "${zopfli}/bin/zopfli {} && ${brotli}/bin/brotli {}"
+      ${findutils}/bin/xargs -P''$(${coreutils}/bin/nproc) -I{} sh -c \
+        "${zopfli}/bin/zopfli {} && ${brotli}/bin/brotli {}"
   '';
   installPhase = ''mv static $out'';
 }

pkgs/e11sync.nix

@@ -20,10 +20,10 @@ stdenv.mkDerivation {
   ];
   nativeBuildInputs = [makeWrapper];
   src = self;
-  dontUnpack = true;
-  buildPhase = ''
-    mkdir -p $out;
-    cp -r ${self}/app $out
+  patchPhase = ''patchShebangs --build app/manage.py'';
+  buildPhase = ''mkdir -p $out'';
+  installPhase = ''
+    cp -r app $out
     makeWrapper ${python3Packages.gunicorn}/bin/gunicorn $out/bin/e11sync-gunicorn \
       --chdir $out/app \
       --set-default E11SYNC_HTTP_PORT ${toString gunicornPort} \
@@ -39,7 +39,6 @@ stdenv.mkDerivation {
   passthru.tests = {
     unit =
       runCommand "e11sync-test" {
-        src = self;
         buildInputs = [
           python3Packages.django_5
           python3Packages.django-compressor