Add pypi2nix to shell.nix

nix/sources.json

@@ -22,5 +22,17 @@
         "type": "tarball",
         "url": "https://github.com/NixOS/nixpkgs-channels/archive/0bffd2150e5bbd9671bf98817a72e87ae41bc0ed.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "pypi2nix": {
+        "branch": "master",
+        "description": "Generate Nix expressions for Python packages [maintainer=@seppeljordan]",
+        "homepage": "",
+        "owner": "nix-community",
+        "repo": "pypi2nix",
+        "rev": "e56cbbce0812359e80ced3d860e1f232323b2976",
+        "sha256": "1vhdippb0daszp3a0m3zb9qcb25m6yib4rpggaiimg7yxwwwzyh4",
+        "type": "tarball",
+        "url": "https://github.com/nix-community/pypi2nix/archive/e56cbbce0812359e80ced3d860e1f232323b2976.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }

shell.nix

@@ -2,12 +2,14 @@
 
 let
   pkgs = import sources.nixpkgs {};
+  pypi2nix = import sources.pypi2nix {};
   python = import ./requirements.nix { inherit pkgs; };
 in
   pkgs.mkShell {
     name = "strojnadzor-env";
     buildInputs = [
       pkgs.nodejs
+      pypi2nix
       python.interpreter
     ];
     shellHook = ''