diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index f682ecfb06c..83c91fc04da 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -145,9 +145,10 @@ let
         export CRYSTAL_CACHE_DIR=$TMP
       '';
 
-      buildInputs = commonBuildInputs extraBuildInputs;
 
+      strictDeps = true;
       nativeBuildInputs = [ binary makeWrapper which pkg-config llvmPackages.llvm ];
+      buildInputs = commonBuildInputs extraBuildInputs;
 
       makeFlags = [
         "CRYSTAL_CONFIG_VERSION=${version}"