diff --git a/flake.lock b/flake.lock
index 04081b9..005400f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1692260837,
-        "narHash": "sha256-2FpkX1zl+7ni7djK7NeE1ZGupRUwZgjW+RPCSBgDf4k=",
+        "lastModified": 1691882297,
+        "narHash": "sha256-e1/LAQSGLnBywfA1TfMl0Vj3tvYka73XOZ/D2/CJowE=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "6a94c1a59737783c282c4031555a289c28b961e4",
+        "rev": "c3ab5ea047e6dc73df530948f7367455749d8906",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1692174805,
-        "narHash": "sha256-xmNPFDi/AUMIxwgOH/IVom55Dks34u1g7sFKKebxUm0=",
+        "lastModified": 1691654369,
+        "narHash": "sha256-gSILTEx1jRaJjwZxRlnu3ZwMn1FVNk80qlwiCX8kmpo=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "caac0eb6bdcad0b32cb2522e03e4002c8975c62e",
+        "rev": "ce5e4a6ef2e59d89a971bc434ca8ca222b9c7f5e",
         "type": "github"
       },
       "original": {
diff --git a/home/desktop.nix b/home/desktop.nix
index 214f269..749afdd 100644
--- a/home/desktop.nix
+++ b/home/desktop.nix
@@ -24,10 +24,7 @@
     monaco-powerline
     mtools
     mtr
-    # TODO: Zig currently has issues under Darwin, so
-    # we'll temporarily prefer ncdu 1.x.
-    # See also: https://github.com/NixOS/nixpkgs/pull/249722
-    ncdu_1
+    ncdu
     neofetch
     nixopsUnstable
     p7zip
diff --git a/pkgs/swiftformat.nix b/pkgs/swiftformat.nix
index a1004a8..e1e4579 100644
--- a/pkgs/swiftformat.nix
+++ b/pkgs/swiftformat.nix
@@ -1,14 +1,19 @@
 { stdenv, lib, fetchFromGitHub, swift, swiftpm, swiftPackages }:
 
+# This derivation is impure: it relies on an Xcode toolchain being installed
+# and available in the expected place. The values of sandboxProfile and
+# hydraPlatforms are copied pretty directly from the MacVim derivation, which
+# is also impure.
+
 stdenv.mkDerivation rec {
   pname = "swiftformat";
-  version = "0.52.1";
+  version = "0.52.0";
 
   src = fetchFromGitHub {
     owner = "nicklockwood";
     repo = "SwiftFormat";
     rev = version;
-    sha256 = "sha256-0JSspbYIYXfE3oDMi2EfR7pZzQsEtbvB8LJplOtq2sk=";
+    sha256 = "sha256-Y8ZbmFdrNCzfGLeA+nPc0DHXBHaUw6JFpONbm+LnTjk=";
   };
 
   nativeBuildInputs = [ swift swiftpm ];