diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index f0786d54b4fd..1688e92c8441 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, nix, callPackage, nixUnstable, nixosTests }:
+{ fetchFromGitHub, callPackage, nixVersions, nixosTests }:
 
 {
   hydra-unstable = callPackage ./common.nix {
@@ -9,7 +9,7 @@
       rev = "9bce425c3304173548d8e822029644bb51d35263";
       sha256 = "sha256-tGzwKNW/odtAYcazWA9bPVSmVXMGKfXsqCA1UYaaxmU=";
     };
-    nix = nixUnstable;
+    nix = nixVersions.unstable;
 
     tests = {
       basic = nixosTests.hydra.hydra-unstable;