diff --git a/flake.nix b/flake.nix
index 1b2bf20..be2599e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -88,13 +88,20 @@
         # Solving platform specific spaghetti below
         runtimeForTarget = target: let
           system = zig2nix-lib.mkZigSystemFromString target;
+          double = nlib.systems.parse.doubleFromSystem system;
+          targetPkgs = nixpkgs.outputs.legacyPackages.${double};
           env = {
             linux = {
               LIBRARY_PATH = "LD_LIBRARY_PATH";
               nativeBuildInputs = [ pkgs.autoPatchelfHook ];
             };
-            darwin = {
+            darwin = let
+             sdk =
+                if (nlib.versionAtLeast targetPkgs.targetPlatform.darwinSdkVersion "10.13") then targetPkgs.darwin.apple_sdk.MacOSX-SDK
+                else warn "zig only supports macOS 10.13+, forcing SDK 11.0" targetPkgs.darwin.apple_sdk_11_0.MacOSX-SDK;
+            in {
               LIBRARY_PATH = "DYLD_LIBRARY_PATH";
+              defaultTargetFlags = [ "--sysroot" sdk ];
             };
           };
           libs = {
diff --git a/lib.nix b/lib.nix
index 6575fe1..457fb2d 100644
--- a/lib.nix
+++ b/lib.nix
@@ -76,7 +76,7 @@ rec {
       darwin = let
          sdkVer =
             if (versionAtLeast p.darwinSdkVersion "10.13") then p.darwinSdkVersion
-            else warn "zig only supports macOS 10.13+, forcing darwinSdkVersion to 10.13" "10.13";
+            else warn "zig only supports macOS 10.13+, forcing SDK 11.0" "11.0";
       in "${system.zig.cpu}-${system.zig.kernel}.${sdkVer}-${system.zig.abi}";
    }.${system.kernel.name} or (zigTripleFromSystem system);
 
diff --git a/package.nix b/package.nix
index 66150b2..4633c4d 100644
--- a/package.nix
+++ b/package.nix
@@ -32,18 +32,20 @@ let
   wrapper-args = zigWrapperArgs
     ++ optionals (length runtime.bins > 0) [ "--prefix" "PATH" ":" (makeBinPath runtime.bins) ]
     ++ optionals (length runtime.libs > 0) [ "--prefix" runtime.env.LIBRARY_PATH ":" (makeLibraryPath runtime.libs) ];
-  attrs = lib.optionalAttrs (pathExists zigBuildZon && !userAttrs ? name) {
+  attrs = optionalAttrs (pathExists zigBuildZon && !userAttrs ? name) {
     pname = zon.name;
-  } // lib.optionalAttrs (pathExists zigBuildZon && !userAttrs ? version) {
+  } // optionalAttrs (pathExists zigBuildZon && !userAttrs ? version) {
     version = zon.version;
   } // userAttrs;
-  default-flags = if lib.versionAtLeast zig.version "0.11" then
+  default-flags =
+    if versionAtLeast zig.version "0.11" then
       [ "-Doptimize=ReleaseSafe" ]
     else
       [ "-Drelease-safe=true" ];
+  default-target-flags = optionals (zigTarget == null) (runtime.env.defaultTargetFlags or []);
 in stdenvNoCC.mkDerivation (
   attrs // {
-    zigBuildFlags = (attrs.zigBuildFlags or default-flags) ++ [ "-Dtarget=${target}" ];
+    zigBuildFlags = (attrs.zigBuildFlags or default-flags) ++ [ "-Dtarget=${target}" ] ++ default-target-flags;
     nativeBuildInputs = [ zig.hook makeWrapper ]
       ++ (runtime.env.nativeBuildInputs or [])
       ++ (attrs.nativeBuildInputs or []);