diff --git a/build.zig.zon.nix b/build.zig.zon.nix
index a6d768180..3c4f4d855 100644
--- a/build.zig.zon.nix
+++ b/build.zig.zon.nix
@@ -5,7 +5,7 @@
   fetchurl,
   fetchgit,
   runCommandLocal,
-  zig_0_14,
+  zig_0_15,
   name ? "zig-packages",
 }: let
   unpackZigArtifact = {
@@ -14,7 +14,7 @@
   }:
     runCommandLocal name
     {
-      nativeBuildInputs = [zig_0_14];
+      nativeBuildInputs = [zig_0_15];
     }
     ''
       hash="$(zig fetch --global-cache-dir "$TMPDIR" ${artifact})"
diff --git a/nix/build-support/check-zig-cache.sh b/nix/build-support/check-zig-cache.sh
index e92a27b6f..9a3927846 100755
--- a/nix/build-support/check-zig-cache.sh
+++ b/nix/build-support/check-zig-cache.sh
@@ -79,7 +79,7 @@ elif [ "$1" != "--update" ]; then
   exit 1
 fi
 
-zon2nix "$BUILD_ZIG_ZON" --14 --nix "$WORK_DIR/build.zig.zon.nix" --txt "$WORK_DIR/build.zig.zon.txt" --json "$WORK_DIR/build.zig.zon.json" --flatpak "$WORK_DIR/zig-packages.json"
+zon2nix "$BUILD_ZIG_ZON" --15 --nix "$WORK_DIR/build.zig.zon.nix" --txt "$WORK_DIR/build.zig.zon.txt" --json "$WORK_DIR/build.zig.zon.json" --flatpak "$WORK_DIR/zig-packages.json"
 alejandra --quiet "$WORK_DIR/build.zig.zon.nix"
 prettier --log-level warn --write "$WORK_DIR/build.zig.zon.json"
 prettier --log-level warn --write "$WORK_DIR/zig-packages.json"