diff --git a/pkgs/development/compilers/llvm/common/libcxx/default.nix b/pkgs/development/compilers/llvm/common/libcxx/default.nix
index bdc8a08cdd3c..a47ba2d46219 100644
--- a/pkgs/development/compilers/llvm/common/libcxx/default.nix
+++ b/pkgs/development/compilers/llvm/common/libcxx/default.nix
@@ -26,8 +26,7 @@
 # https://github.com/NixOS/nixpkgs/issues/269548
 assert cxxabi == null || !stdenv.hostPlatform.isDarwin;
 let
-  basename = "libcxx";
-  pname = basename;
+  pname = "libcxx";
   cxxabiName = "lib${if cxxabi == null then "cxxabi" else cxxabi.libName}";
   runtimes = [ "libcxx" ] ++ lib.optional (cxxabi == null) "libcxxabi";