spectacle: use minimal opencv

pkgs/kde/gear/spectacle/default.nix

@@ -7,6 +7,14 @@
 mkKdeDerivation {
   pname = "spectacle";
 
-  extraBuildInputs = [qtwayland qtmultimedia opencv];
+  extraBuildInputs = [
+    qtwayland
+    qtmultimedia
+    (opencv.override {
+      enableCuda = false;                    # fails to compile, disabled in case someone sets config.cudaSupport
+      enabledModules = [ "core" "imgproc" ]; # https://invent.kde.org/graphics/spectacle/-/blob/master/CMakeLists.txt?ref_type=heads#L83
+      runAccuracyTests = false;              # tests will fail because of missing plugins but that's okay
+    })
+  ];
   meta.mainProgram = "spectacle";
 }