diff --git a/flake.lock b/flake.lock
index c78a5c7..5e668ca 100644
--- a/flake.lock
+++ b/flake.lock
@@ -50,16 +50,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1650109093,
-        "narHash": "sha256-tqlnKrAdJktRLXTou9le0oTqrYBAFpGscV5RADdpArU=",
+        "lastModified": 1659782844,
+        "narHash": "sha256-tM/qhHFE61puBxh9ebP3BIG1fkRAT4rHqD3jCM0HXGY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "faad370edcb37162401be50d45526f52bb16a713",
+        "rev": "c85e56bb060291eac3fb3c75d4e0e64f6836fcfe",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixpkgs-unstable",
         "type": "indirect"
       }
     },
@@ -92,13 +91,13 @@
     "snapshot-header": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-Y/DTtpnT8JQZO5Ijr+tW0IrIOuECcJ+ZvFLCgwrFt2M=",
+        "narHash": "sha256-/2aR6n5CbUobwbxkrGqBOAhCZLwDdIsoIOcpALhAUF8=",
         "type": "tarball",
-        "url": "https://opensource.apple.com/tarballs/xnu/xnu-6153.141.1.tar.gz"
+        "url": "https://github.com/apple/darwin-xnu/archive/refs/tags/xnu-6153.141.1.tar.gz"
       },
       "original": {
         "type": "tarball",
-        "url": "https://opensource.apple.com/tarballs/xnu/xnu-6153.141.1.tar.gz"
+        "url": "https://github.com/apple/darwin-xnu/archive/refs/tags/xnu-6153.141.1.tar.gz"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index bbbb524..a3f4df2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,21 +14,20 @@
 			flake = false;
 		};
 		snapshot-header = {
-			url = "https://opensource.apple.com/tarballs/xnu/xnu-6153.141.1.tar.gz";
+			url = "https://github.com/apple/darwin-xnu/archive/refs/tags/xnu-6153.141.1.tar.gz";
 			flake = false;
 		};
 		snap-util = {
 			url = "github:ahl/apfs";
 			flake = false;
 		};
-		nixpkgs.url = "flake:nixpkgs/nixpkgs-unstable";
 	};
 	outputs = { self, nixpkgs, acextract, command-line, dsc-extractor, snapshot-header, snap-util }: {
 		packages.x86_64-darwin = {
 			acextract =
 				with import nixpkgs { system = "x86_64-darwin"; };
 				let xcode = makeSetupHook {
-					deps = [ (xcodeenv.composeXcodeWrapper { version = "13.4"; }) ];
+					deps = [ (xcodeenv.composeXcodeWrapper { version = "14.1"; }) ];
 				} "${xcbuildHook}/nix-support/setup-hook";
 				in stdenv.mkDerivation {
 					name = "acextract-${lib.substring 0 8 self.inputs.acextract.lastModifiedDate}";
@@ -89,7 +88,7 @@
 				stdenv.mkDerivation {
 					name = "snap-util-${lib.substring 0 8 self.inputs.snap-util.lastModifiedDate}";
 					src = snap-util;
-					nativeBuildInputs = [ (xcodeenv.composeXcodeWrapper { version = "13.4"; }) ];
+					nativeBuildInputs = [ (xcodeenv.composeXcodeWrapper { version = "14.1"; }) ];
 					preBuild = "NIX_CFLAGS_COMPILE='-idirafter ${snapshot-header}/bsd'";
 					installPhase = ''
 						mkdir -p $out/bin