add overrides for python

overrides/python/default.nix

@@ -0,0 +1,57 @@
+{
+  lib,
+  pkgs,
+  # dream2nix
+  satisfiesSemver,
+  ...
+}: let
+  l = lib // builtins;
+
+  # include this into an override to enable cntr debugging
+  # (linux only)
+  cntr = {
+    nativeBuildInputs = old: old ++ [pkgs.breakpointHook];
+    b = "${pkgs.busybox}/bin/busybox";
+  };
+
+  # helper that should be prepended to any sed call to ensure the file
+  # is actually modified.
+  ensureFileModified = pkgs.writeScript "ensure-file-changed" ''
+    #!${pkgs.bash}/bin/bash
+    file=$1
+    cp $file $TMP/ensureFileModified
+    "''${@:2}"
+    if diff -q $file $TMP/ensureFileModified; then
+      echo -e "file $file could not be modified as expected by command:\n  ''${@:2}"
+      exit 1
+    fi
+  '';
+
+  pythonQtDeps = {
+    overrideAttrs = oldAttrs: {
+      buildInputs =
+        oldAttrs.buildInputs
+        ++ (with pkgs; [
+          atk.out
+          cairo.out
+          cups.lib
+          gdk-pixbuf.out
+          gnome2.pango.out
+          gtk3-x11.out
+          libsForQt5.full.out
+          libsForQt5.qt5.qtgamepad.out
+          libsForQt5.qt5.qtspeech.out
+          postgresql_14.lib
+          speechd.out
+          unixODBC.out
+        ]);
+    };
+  };
+in
+  ## OVERRIDES
+  {
+    orange3 = {inherit pythonQtDeps;};
+    labelimg = {inherit pythonQtDeps;};
+    labelme = {inherit pythonQtDeps;};
+    urh = {inherit pythonQtDeps;};
+  }