diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index c2d016a1bc33..d1992725e796 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -119,6 +119,14 @@ in lib.makeExtensible (self: {
     ];
   };
 
+  nix_2_12 = common {
+    version = "2.12.0";
+    sha256 = "sha256-sQ9C101CL/eVN5JgH91ozHFWU4+bXr8/Fi/8NQk6xRI=";
+    patches = [
+      ./patches/flaky-tests.patch
+    ];
+  };
+
   stable = self.nix_2_11;
 
   unstable = self.stable;