diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 44bbd05aec7..e5c8a709a90 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -9,7 +9,7 @@
 }:
 
 let
-  inherit (stdenv.lib) optional optionalString;
+  inherit (stdenv.lib) optionals optional optionalString;
   inherit (darwin.apple_sdk.frameworks) Security;
 
   llvmSharedForBuild = pkgsBuildBuild.llvm_9.override { enableSharedLibraries = true; };
@@ -83,12 +83,12 @@ in stdenv.mkDerivation rec {
     "${setBuild}.cxx=${cxxForBuild}"
     "${setHost}.cxx=${cxxForHost}"
     "${setTarget}.cxx=${cxxForTarget}"
-  ] ++ optional (!withBundledLLVM) [
+  ] ++ optionals (!withBundledLLVM) [
     "--enable-llvm-link-shared"
     "${setBuild}.llvm-config=${llvmSharedForBuild}/bin/llvm-config"
     "${setHost}.llvm-config=${llvmSharedForHost}/bin/llvm-config"
     "${setTarget}.llvm-config=${llvmSharedForTarget}/bin/llvm-config"
-  ] ++ optional stdenv.isLinux [
+  ] ++ optionals stdenv.isLinux [
     "--enable-profiler" # build libprofiler_builtins
   ];