{
  description = "Build Project Terminal";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
    imgui.url = "github:ocornut/imgui?ref=docking";
    imgui.flake = false;
  };

  outputs = { self, nixpkgs, imgui }@inputs: 
    let

      system = "x86_64-linux";
    
      pkgs = nixpkgs.legacyPackages.${system};

      renderer = "vulkan";

      window = "sdl2";
      
    in {

    packages.${system}.default = pkgs.stdenv.mkDerivation {

      name = "Terminal";

      inherit system;

      src = ./.;

      imgui = inputs.imgui;

      

      buildInputs = with pkgs; if renderer == "vulkan" && window == "sdl2" then [
        tinyobjloader
        stb
        glm
        shaderc
        SDL2
        vulkan-headers
        vulkan-loader
      ] else if renderer == "vulkan" && window == "glfw" then [
        stb
        glm
        shaderc
        glfw
        vulkan-headers
        vulkan-loader
      ] else if renderer == "opengl3" && window == "sdl2" then [
        stb
        glm
        SDL2

      ] else if renderer == "opengl3" && window == "glfw" then [
        stb
        glm
        glfw
      ] else [];

      buildPhase = if renderer == "vulkan" && window == "sdl2" then 
      ''
      glslc shaders/*.vert -o vert.spv
      glslc shaders/*.frag -o frag.spv
      g++ src/*.cpp renderer/vulkanRenderer.cpp window/sdl2Window.cpp layers/*.cpp events/*.cpp \
       -I src -I renderer -I window -I layers -I events \
       -I $imgui -I $imgui/backends -I ${pkgs.stb}/include/stb $(sdl2-config --cflags) \
       $imgui/*.cpp $imgui/backends/*sdl2.cpp $imgui/backends/*vulkan.cpp \
       -lSDL2 -lvulkan -o $name -DIMGUI_ENABLE -DSHDR_PATH=$out/bin
      '' 
      else if renderer == "vulkan" && window == "glfw" then 
      ''
      glslc shaders/*.vert -o vert.spv
      glslc shaders/*.frag -o frag.spv
      g++ src/*.cpp renderer/vulkanRenderer.cpp window/sdl2Window.cpp layers/*.cpp events/*.cpp \
       -I src -I renderer -I window -I layers -I events \
       -I $imgui -I $imgui/backends -I ${pkgs.stb}/include/stb $(sdl2-config --cflags) \
       $imgui/*.cpp $imgui/backends/*sdl2.cpp $imgui/backends/*vulkan.cpp \
       -lSDL2 -lvulkan -o $name -DIMGUI_ENABLE -DSHDR_PATH=$out/bin
      '' 
      else if renderer == "opengl3" && window == "sdl2" then 
      ''
      glslc shaders/*.vert -o vert.spv
      glslc shaders/*.frag -o frag.spv
      g++ src/*.cpp renderer/vulkanRenderer.cpp window/sdl2Window.cpp layers/*.cpp events/*.cpp \
       -I src -I renderer -I window -I layers -I events \
       -I $imgui -I $imgui/backends -I ${pkgs.stb}/include/stb $(sdl2-config --cflags) \
       $imgui/*.cpp $imgui/backends/*sdl2.cpp $imgui/backends/*vulkan.cpp \
       -lSDL2 -lvulkan -o $name -DIMGUI_ENABLE -DSHDR_PATH=$out/bin
      '' 
      else if renderer == "opengl3" && window == "glfw" then 
      ''
      glslc shaders/*.vert -o vert.spv
      glslc shaders/*.frag -o frag.spv
      g++ src/*.cpp renderer/vulkanRenderer.cpp window/sdl2Window.cpp layers/*.cpp events/*.cpp \
       -I src -I renderer -I window -I layers -I events \
       -I $imgui -I $imgui/backends -I ${pkgs.stb}/include/stb $(sdl2-config --cflags) \
       $imgui/*.cpp $imgui/backends/*sdl2.cpp $imgui/backends/*vulkan.cpp \
       -lSDL2 -lvulkan -o $name -DIMGUI_ENABLE -DSHDR_PATH=$out/bin
      '' else '''';

      installPhase = ''
      mkdir -p $out/bin
      cp *.spv $out/bin
      cp $name $out/bin
      '';

    };

    shaders = pkgs.stdenv.mkDerivation {

      name = "Terminal";

      inherit system;

      src = ./.;

      buildInputs = with pkgs; [
        shaderc
      ];

      buildPhase = ''
      glslc shaders/*.vert -o vert.spv
      glslc shaders/*.frag -o frag.spv
      '';

      installPhase = ''
      mkdir -p $out/bin
      cp *.spv $out/bin
      '';

    };
  };
}