1 files changed, 2 insertions, 2 deletions
diff --git a/shell.nix b/shell.nix
index b22db3f..d5d23ee 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
-with import <nixpkgs> { };
-
+#with import <nixpkgs> { };
+with import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/27212188ee8072ee79a4633e95fb5c731d40e1c0.tar.gz") { };
 let
     R-packages = rWrapper.override { packages = with rPackages; [ ggplot2 Rtsne ]; };
     gems = pkgs.bundlerEnv { name = "mutagenicity"; gemdir = ./.; };