[Init]

pkgs/custom/simc.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub, wrapQtAppsHook,  qmake, qtbase, qtwebengine, qtwayland
+}:
+stdenv.mkDerivation rec {
+  pname = "simc";
+  version = "b25fae6260d301894979ef0f0142c3581eb0ef4f";
+
+  src = fetchFromGitHub rec {
+            owner = "simulationcraft";
+            repo = "simc";
+            rev = "b06be33b1d7be68631068c483537ee588bbfa590";
+            hash = "sha256-H8Miq/kZ+hWVvsugrSE5/i/CyhgZ7pD9kSdfC64rdPQ=";
+        };
+
+  nativeBuildInputs = [ wrapQtAppsHook qmake qtwebengine qtbase ];
+
+  buildInputs = [ qtwayland ];
+  
+  configurePhase = ''
+    qmake simulationcraft.pro
+  '';
+
+  buildPhase = ''
+    SC_NO_NETWORKING=1 make -j$NIX_BUILD_CORES
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mv gui/SimulationCraft $out/bin
+  '';
+
+}

pkgs/default.nix

@@ -0,0 +1,6 @@
+{
+    pkgs ? import <nixpkgs> {},
+    ...
+}:{
+    simc = (pkgs.qt6.callPackage  ./custom/simc.nix { });
+}

pkgs/overlay.nix

@@ -0,0 +1,17 @@
+{
+    pkgs,
+    ...
+}:
+ [(self: super: { 
+    openttd-jgrpp = super.openttd-jgrpp.overrideAttrs (old: rec{ 
+        version = "0.53.3";
+
+        src = super.fetchFromGitHub rec {
+            owner = "JGRennison";
+            repo = "OpenTTD-patches";
+            rev = "jgrpp-0.53.3";
+            hash = "sha256-xpo4E07ifWUZy5z78Fwm1SpLP3wUBaBreZYbJuiNH3w=";
+        };
+    }); 
+
+})]