diff --git a/crypto3/crypto3.nix b/crypto3/crypto3.nix
index ea2394e694..8d5a167360 100644
--- a/crypto3/crypto3.nix
+++ b/crypto3/crypto3.nix
@@ -33,6 +33,7 @@ in stdenv.mkDerivation {
       (if enableDebug then "-DCMAKE_BUILD_TYPE=Debug" else "-DCMAKE_BUILD_TYPE=Release")
       (if enableDebug then "-DCMAKE_CXX_FLAGS=-ggdb" else "")
       (if enableDebug then "-DCMAKE_CXX_FLAGS=-O0" else "")
+      "-G Ninja"
     ];
 
   doCheck = runTests; # tests are inside crypto3-tests derivation