diff --git a/pkgs/by-name/ma/matrix-brandy/package.nix b/pkgs/by-name/ma/matrix-brandy/package.nix
index 13088cec236f5..bf9d518783c35 100644
--- a/pkgs/by-name/ma/matrix-brandy/package.nix
+++ b/pkgs/by-name/ma/matrix-brandy/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  libX11,
   SDL,
 }:
 
@@ -17,6 +18,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [
+    libX11
     SDL
   ];