overrides/python: init opencv-python

overrides/python/opencv-python/default.nix

@@ -0,0 +1,20 @@
+{
+  config,
+  lib,
+  ...
+}: {
+  # TODO: supply more of the dependencies instead of ignoring them
+  env.autoPatchelfIgnoreMissingDeps = true;
+  mkDerivation.buildInputs = [
+    config.deps.libglvnd
+    config.deps.glib
+  ];
+  deps = {nixpkgs, ...}:
+    lib.mapAttrs (_: lib.mkDefault) {
+      inherit
+        (nixpkgs)
+        libglvnd
+        glib
+        ;
+    };
+}