feat: add flake support

flake.nix

@@ -14,6 +14,9 @@
     let
       adam-gui-libs = with pkgs; [
     libGL pkg-config xorg.libX11.dev xorg.libXcursor xorg.libXi xorg.libXinerama xorg.libXrandr xorg.libXxf86vm
+    ];
+    kon-libs = with pkgs; [
+    pkg-config
   ];
       pkgs = import nixpkgs {
         system = "x86_64-linux";
@@ -66,7 +69,7 @@
 
               postInstall = ''
                 wrapProgram "$out/bin/kon" \
-                --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath libs}
+                --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath kon-libs}
               '';
             });
           adam-gui = pkgs.symlinkJoin {
@@ -80,7 +83,7 @@
                 buildInputs = [
                   gcc
                   go
-                ] ++ libs;
+                ] ++ kon-libs;
 
                 nativeBuildInputs = with pkgs; [
                   pkg-config
@@ -110,7 +113,7 @@
 
                 postInstall = ''
                   wrapProgram "$out/bin/adam-gui" \
-                  --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath libs}
+                  --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath adam-gui-libs}
                 '';
 
                 postFixup = ''