diff --git a/pkgs/development/compilers/llvm/common/tblgen.nix b/pkgs/development/compilers/llvm/common/tblgen.nix
index 36b1320bfd3b..b59bc87b2c88 100644
--- a/pkgs/development/compilers/llvm/common/tblgen.nix
+++ b/pkgs/development/compilers/llvm/common/tblgen.nix
@@ -95,6 +95,8 @@ let
       updateAutotoolsGnuConfigScriptsHook
     ];
 
+    strictDeps = true;
+
     cmakeFlags = [
       # Projects with tablegen-like tools.
       "-DLLVM_ENABLE_PROJECTS=${