diff --git a/nix/devshell.nix b/nix/devshell.nix
index 6a52ed515..97a3fa871 100644
--- a/nix/devshell.nix
+++ b/nix/devshell.nix
@@ -3,6 +3,7 @@
 , gdb
 , pkg-config
 , scdoc
+, vttest
 , zig
 
 , libGL
@@ -15,12 +16,15 @@
     pkg-config
     scdoc
     zig
+
+    vttest
   ];
 
   buildInputs = [
+    # TODO: non-linux
   ] ++ lib.optionals stdenv.isLinux [
     libX11
   ];
 
-  LD_LIBRARY_PATH="${libGL}/lib";
+  LD_LIBRARY_PATH = "${libGL}/lib";
 }