diff --git a/hhvm.nix b/hhvm.nix
index 283fdb370db045..096ecc37f983d8 100644
--- a/hhvm.nix
+++ b/hhvm.nix
@@ -231,7 +231,7 @@ stdenv.mkDerivation rec {
   checkPhase =
     ''
       set -ex
-      export HHVM_BIN="$PWD/hphp/hhvm/hhvm"
+      export HHVM_BIN="$PWD/build/hphp/hhvm/hhvm"
       cd ${./.}
       "$HHVM_BIN" hphp/test/run.php quick
     '';