1 files changed, 7 insertions, 4 deletions

diff --git a/nix_path_env b/nix_path_env
index 7ded4ac..8e4c84d 100644
--- a/nix_path_env
+++ b/nix_path_env
@@ -1,9 +1,12 @@
 #!/bin/bash
 
-# This will automatically upgrade to latest version at each build
-# nixpkgs="https://nixos.org/channels/nixos-19.03/nixexprs.tar.xz"
-nixpkgs="https://releases.nixos.org/nixos/19.03/nixos-19.03beta171931.3a4ffdd38b5/nixexprs.tar.xz"
-nixpkgsPrevious="$nixpkgs"
+if [ -z "$NIXOPS_DEPLOYMENT" ]; then
+  # This will automatically upgrade to latest version at each build
+  nixpkgs="https://nixos.org/channels/nixos-19.03/nixexprs.tar.xz"
+else
+  nixpkgs="https://releases.nixos.org/nixos/19.03/nixos-19.03beta171931.3a4ffdd38b5/nixexprs.tar.xz"
+fi
+nixpkgsPrevious="https://releases.nixos.org/nixos/19.03/nixos-19.03beta171931.3a4ffdd38b5/nixexprs.tar.xz"
 nixpkgsNext="$nixpkgs"
 export NIX_PATH="nixpkgs=$nixpkgs:nixpkgsNext=$nixpkgsNext:nixpkgsPrevious=$nixpkgsPrevious"