diff --git a/pkgs/by-name/ca/caligula/package.nix b/pkgs/by-name/ca/caligula/package.nix
index 8deb9c61a113..41fc669983d2 100644
--- a/pkgs/by-name/ca/caligula/package.nix
+++ b/pkgs/by-name/ca/caligula/package.nix
@@ -1,6 +1,7 @@
 { lib
 , rustPlatform
 , fetchFromGitHub
+, llvmPackages
 , stdenv
 , darwin
 }:
@@ -18,6 +19,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-ma7JVbWSiKfkCXCDwA8DFm2+KPrWR+8nSdgGSqehNg8=";
 
+  env = {
+     LIBCLANG_PATH = "${llvmPackages.libclang.lib}/lib";
+   };
+
+
   buildInputs = lib.optionals stdenv.isDarwin (
     with darwin.apple_sdk.frameworks; [
       Cocoa