poetry: Remove hacky build steps

Poetry can now be built normally.

pkgs/poetry/default.nix

@@ -1,52 +1,28 @@
-{ lib, poetry2nix, python, fetchFromGitHub, runtimeShell }:
+{ lib, poetry2nix, python, fetchFromGitHub }:
 
 
 poetry2nix.mkPoetryApplication {
 
   inherit python;
 
-  pyproject = ./pyproject.toml;
-  poetrylock = ./poetry.lock;
+  projectDir = ./.;
 
   src = fetchFromGitHub (lib.importJSON ./src.json);
 
   # "Vendor" dependencies (for build-system support)
   postPatch = ''
-    for path in ''${PYTHONPATH//:/ }; do
+    for path in ''${PYTHONPATH//:/ }; do echo $path; done | uniq | while read path; do
       echo "sys.path.insert(0, \"$path\")" >> poetry/__init__.py
     done
   '';
 
-  # Poetry is a bit special in that it can't use itself as the `build-system` property in pyproject.toml.
-  # That's why we need to hackily install outputs completely manually.
-  #
-  # For projects using poetry normally overriding the installPhase is not required.
-  installPhase = ''
-    runHook preInstall
-
-    mkdir -p $out/lib/${python.libPrefix}/site-packages
-    cp -r poetry $out/lib/${python.libPrefix}/site-packages
-
-    mkdir -p $out/bin
-    cat > $out/bin/poetry <<EOF
-    #!${python.interpreter}
-    import sys
-
-    if __name__ == '__main__':
-        sys.path.append("$out/lib/${python.libPrefix}/site-packages")
-        from poetry.console import main
-        main()
-    EOF
-    chmod +x $out/bin/poetry
-
+  postInstall = ''
     mkdir -p "$out/share/bash-completion/completions"
     "$out/bin/poetry" completions bash > "$out/share/bash-completion/completions/poetry"
     mkdir -p "$out/share/zsh/vendor-completions"
     "$out/bin/poetry" completions zsh > "$out/share/zsh/vendor-completions/_poetry"
     mkdir -p "$out/share/fish/vendor_completions.d"
     "$out/bin/poetry" completions fish > "$out/share/fish/vendor_completions.d/poetry.fish"
-
-    runHook postInstall
   '';
 
   # Propagating dependencies leads to issues downstream