add openmodelica

configuration.nix

@@ -6,8 +6,7 @@
 let
   myRizin = pkgs.rizin.passthru.withPlugins
     (plugins: [ plugins.jsdec plugins.rz-ghidra ]);
-in
-{
+in {
   imports = [
     ./hardware-configuration.nix
     ./services/virtual.nix
@@ -20,9 +19,7 @@ in
 
   nixpkgs.config.allowUnfree = true;
 
-  boot.kernel.sysctl = {
-    "net.ipv4.ip_forward" = 1;
-  };
+  boot.kernel.sysctl = { "net.ipv4.ip_forward" = 1; };
 
   #boot.loader.grub.device = "/dev/nvme1n1p1";
   boot.loader = {
@@ -113,9 +110,20 @@ in
     myRizin
     libgit2
     inputs.helix.packages."${pkgs.system}".helix
+    openmodelica
   ];
 
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
+  nix.settings.trusted-users = [ "root" "allen" ];
+
+  nix.settings = {
+    substituters =
+      [ "https://allen-nixpkgs.cachix.org" "https://cache.nixos.org" ];
+    trusted-public-keys = [
+      "allen-nixpkgs.cachix.org-1:GS5qDYVloEiC6oeJQNijR3hsMKPqDSGbYUz35qtbMpg="
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+    ];
+  };
 
   environment.variables = {
     LD_LIBRARY_PATH = lib.makeLibraryPath [

flake.nix

@@ -16,6 +16,15 @@
       specialArgs = { inherit inputs; };
       modules = [
         ./configuration.nix
+
+        ({ pkgs, ... }: {
+          # Define the overlay inline or in a separate file
+          nixpkgs.overlays = [
+            (final: prev: {
+              openmodelica = final.callPackage ./nixpkgs/openmodelica.nix { };
+            })
+          ];
+        })
         home-manager.nixosModules.home-manager
         {
           home-manager.useGlobalPkgs = true;
@@ -27,3 +36,4 @@
     };
   };
 }
+

nixpkgs/openmodelica.nix

@@ -0,0 +1,95 @@
+{
+  pkgs ? import <nixpkgs> { },
+}:
+let
+  desktopItem = pkgs.makeDesktopItem {
+    name = "openmodelica";
+    desktopName = "OpenModelica Connection Editor";
+    exec = "OMEdit";
+    icon = "openmodelica";
+    categories = [
+      "Development"
+      "Science"
+      "Education"
+    ];
+    comment = "Modelica-based modeling and simulation environment";
+  };
+in
+
+with pkgs;
+stdenv.mkDerivation {
+  name = "openmodelica-bin";
+  version = "custom";
+  src = pkgs.fetchgit {
+    url = "https://github.com/OpenModelica/OpenModelica.git";
+    rev = "959f964dadf1b928f03e3c2f74b8f816f95df1ef";
+    fetchSubmodules = true;
+    sha256 = "sha256-3rFIrg7+t/eX2mq21v9AcYhV3Adloa8Sae9uRGtbyrY=";
+  };
+
+  nativeBuildInputs = with pkgs; [
+    cmake
+    gfortran
+    pkg-config
+    qt6.wrapQtAppsHook
+    autoPatchelfHook
+    flex
+    autoconf
+    automake
+    libtool
+    ninja
+  ];
+
+  configurePhase = ''
+    cmake -S . -B build_cmake -GNinja -DOM_USE_CCACHE=OFF -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_PREFIX=$out
+  '';
+
+  buildPhase = ''
+    cmake --build build_cmake --parallel $NIX_BUILD_CORES --target install
+  '';
+
+  installPhase = ''
+    cmake --install build_cmake --prefix $out
+    runHook postInstall
+  '';
+
+  postInstall = ''
+    if [ -d "$out/lib64" ]; then
+      mkdir -p $out/lib
+      cp -rn $out/lib64/* $out/lib/
+      rm -rf $out/lib64
+    fi
+
+    mkdir -p $out/share/applications
+    cp ${desktopItem}/share/applications/* $out/share/applications/
+
+    # If you have an icon file in your source, install it too
+    # mkdir -p $out/share/icons/hicolor/scalable/apps
+    # cp $src/path/to/icon.svg $out/share/icons/hicolor/scalable/apps/openmodelica.svg
+  '';
+
+  buildInputs = with pkgs; [
+    # Compilers and Build Tools
+
+    # Dependencies
+    boost
+    hwloc
+    jdk
+    lapack
+    blas
+    hdf5
+    expat
+    omniorb
+    curl
+    ncurses
+    readline
+    openscenegraph
+    qt6.qt5compat
+    qt6.qtbase
+    qt6.qtwebengine
+    qt6.qtdeclarative
+    qt6.qttools
+    lapack-reference
+  ];
+}
+

pkgs/util.nix

@@ -72,4 +72,5 @@ with pkgs; [
   gptfdisk
   openocd
   probe-rs-tools
+  cachix
 ]