feat: Added nix build support

flake.nix

@@ -78,6 +78,14 @@
         craneLib = (crane.mkLib pkgs).overrideToolchain stableToolchain;
         craneLibLLvmTools = (crane.mkLib pkgs).overrideToolchain stableToolchainWithLLvmTools;
 
+        ort_static = pkgs.onnxruntime.overrideAttrs (old: {
+          cmakeFlags =
+            old.cmakeFlags
+            ++ [
+              "-Donnxruntime_BUILD_SHARED_LIB=OFF"
+              "-Donnxruntime_BUILD_STATIC_LIB=ON"
+            ];
+        });
         src = let
           filterBySuffix = path: exts: lib.any (ext: lib.hasSuffix ext path) exts;
           sourceFilters = path: type:
@@ -96,25 +104,16 @@
             filter = sourceFilters;
             src = ./.;
           };
-        commonArgs = let
-          ort_static = pkgs.onnxruntime.overrideAttrs (old: {
-            cmakeFlags =
-              old.cmakeFlags
-              ++ [
-                "-Donnxruntime_BUILD_SHARED_LIB=OFF"
-                "-Donnxruntime_BUILD_STATIC_LIB=ON"
-              ];
-          });
-        in
+        commonArgs =
           {
             inherit src;
             pname = name;
             stdenv = p: p.clangStdenv;
             doCheck = false;
             LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
-            ORT_LIB_LOCATION = "${ort_static}";
-            ORT_ENV_SYSTEM_LIB_LOCATION = "${ort_static}/lib";
-            # ORT_ENV_PREFER_DYNAMIC_LINK = true;
+            ORT_LIB_LOCATION = "${pkgs.onnxruntime}";
+            ORT_ENV_SYSTEM_LIB_LOCATION = "${pkgs.onnxruntime}/lib";
+            ORT_ENV_PREFER_DYNAMIC_LINK = true;
             nativeBuildInputs = with pkgs; [
               cmake
               pkg-config
@@ -192,6 +191,7 @@
         in {
           "${name}" = pkg;
           default = pkg;
+          onnxruntime = ort_static;
         };
 
         devShells = {