diff --git a/.travis.yml b/.travis.yml
index 91e4b5b..66ece26 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ matrix:
 install:
  - nix --version
  - if [ -n "${CACHIX_CACHE}" ]; then travis_retry nix-channel --update; fi
- - if [ -n "${CACHIX_CACHE}" ]; then nix-env -i cachix; fi
+ - if [ -n "${CACHIX_CACHE}" ]; then nix-env -iA cachix -f https://cachix.org/api/v1/install; fi
  - if [ -n "${CACHIX_CACHE}" ]; then cachix use "${CACHIX_CACHE}"; fi
  - nix-channel --add "${NIX_CHANNEL}" nixpkgs
  - travis_retry nix-channel --update