diff --git a/flake.lock b/flake.lock
index d5b7294..122787f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -50,11 +50,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1719468428,
-        "narHash": "sha256-vN5xJAZ4UGREEglh3lfbbkIj+MPEYMuqewMn4atZFaQ=",
+        "lastModified": 1734988233,
+        "narHash": "sha256-Ucfnxq1rF/GjNP3kTL+uTfgdoE9a3fxDftSfeLIS8mA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1e3deb3d8a86a870d925760db1a5adecc64d329d",
+        "rev": "de1864217bfa9b5845f465e771e0ecb48b30e02d",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index befafb6..3b2bc50 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,12 +20,7 @@
 	};
 	outputs = { self, nixpkgs, acextract, command-line, dsc-extractor, snap-util }: {
 		packages.x86_64-darwin = let
-			xcode = (nixpkgs.legacyPackages.x86_64-darwin.xcodeenv.composeXcodeWrapper {
-				version = "16.0";
-			}).overrideAttrs (attrs: { buildCommand = ''
-				# see https://github.com/NixOS/nixpkgs/pull/322641
-				set +o pipefail
-			'' + attrs.buildCommand; });
+			xcode = nixpkgs.legacyPackages.x86_64-darwin.xcodeenv.composeXcodeWrapper {};
 
 		in {
 
@@ -104,7 +99,10 @@
 					name = "snap-util-${lib.substring 0 8 self.inputs.snap-util.lastModifiedDate}";
 					src = snap-util;
 					nativeBuildInputs = [ xcode ];
-					preBuild = "NIX_CFLAGS_COMPILE='-idirafter ${snapshot-header}/bsd'";
+					preBuild = ''
+						unset DEVELOPER_DIR SDKROOT
+						NIX_CFLAGS_COMPILE='-idirafter ${snapshot-header}/bsd'
+					'';
 					installPhase = ''
 						mkdir -p $out/bin
 						cp snapUtil $out/bin/.snapUtil-wrapped