fix and update ci config

.forgejo/workflows/build.nix

@@ -0,0 +1,37 @@
+{pkgs?import<nixpkgs>{}}: pkgs.mkShell (with pkgs; {
+  nativeBuildInputs = [
+    cargo
+    pkg-config
+    freetype
+    libclang
+    #bear
+  ];
+  buildInputs = [
+    jack2
+    lilv
+    serd
+    libclang
+    #suil
+    glib
+    gtk3
+  ];
+  LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
+    pipewire.jack
+    # for ChowKick.lv2:
+    freetype
+    libgcc.lib
+    # for Panagement
+    xorg.libX11
+    xorg.libXcursor
+    xorg.libXi
+    libxkbcommon
+    #suil
+    # for Helm:
+    alsa-lib
+    curl
+    libglvnd
+    #xorg_sys_opengl
+  ];
+  VST3_SDK_DIR = "/home/user/Lab/Music/tek/vst3sdk/";
+  LIBCLANG_PATH = "${pkgs.libclang.lib.outPath}/lib";
+})