diff --git a/release.nix b/release.nix
index 89c477c3a..d2b35b746 100644
--- a/release.nix
+++ b/release.nix
@@ -192,11 +192,11 @@ let
 
     # System tests.
     tests.remote_builds = (import ./tests/remote-builds.nix rec {
-      nix = build { inherit system; }; system = "x86_64-linux";
+      nix = build.x86_64-linux; system = "x86_64-linux";
     }).test;
 
     tests.nix_copy_closure = (import ./tests/nix-copy-closure.nix rec {
-      nix = build { inherit system; }; system = "x86_64-linux";
+      nix = build.x86_64-linux; system = "x86_64-linux";
     }).test;
 
   };