diff --git a/pkgs/development/libraries/harfbuzz/default.nix b/pkgs/development/libraries/harfbuzz/default.nix
index 0bb6546543dc..5e892c1681c2 100644
--- a/pkgs/development/libraries/harfbuzz/default.nix
+++ b/pkgs/development/libraries/harfbuzz/default.nix
@@ -32,8 +32,8 @@
 let
   version = "5.2.0";
   inherit (lib) optional optionals optionalString;
-  mesonFeatureFlag = opt: b:
-    "-D${opt}=${if b then "enabled" else "disabled"}";
+  mesonFeatureFlag = feature: flag:
+    "-D${feature}=${if flag then "enabled" else "disabled"}";
 in
 
 stdenv.mkDerivation {