diff --git a/pkgs/development/compilers/swift/compiler/default.nix b/pkgs/development/compilers/swift/compiler/default.nix
index 5de54078f519..5a9b1f54ac82 100644
--- a/pkgs/development/compilers/swift/compiler/default.nix
+++ b/pkgs/development/compilers/swift/compiler/default.nix
@@ -532,6 +532,7 @@ stdenv.mkDerivation {
     # - We can further reduce targets to just our targetPlatform.
     cmakeFlags="
       -GNinja
+      -DLLVM_BUILD_TOOLS=NO
       -DLLVM_ENABLE_PROJECTS=clang
       -DLLVM_TARGETS_TO_BUILD=${
         {