commit minimal repro

flake.lock

@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1681202837,
+        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1685168767,
+        "narHash": "sha256-wQgnxz0PdqbyKKpsWl/RU8T8QhJQcHfeC6lh1xRUTfk=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e10802309bf9ae351eb27002c85cfdeb1be3b262",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,36 @@
+{
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }@inputs:
+    flake-utils.lib.eachDefaultSystem (system:
+      with import nixpkgs { inherit system; };
+      let
+        myPython = python3.withPackages (p: with p; [
+          tkinter
+        ]);
+      in
+        rec {
+          packages.default = myPython;
+          devShells.works = mkShell {
+            packages = [
+              myPython
+              tcl
+              tk
+            ];
+            TK_LIBRARY = "${tk}/lib/${tk.libPrefix}";
+            shellHook = "python -m tkinter";
+          };
+          devShells.broken = mkShell {
+            packages = [
+              myPython
+              tcl
+              tk
+            ];
+            shellHook = "python -m tkinter";
+          };
+        }
+    );
+}