diff --git a/.travis.yml b/.travis.yml

index 964d8d468062140fa0f95b7d67df38fe213e29b4..cec37dd99db947933fcf479d6cecd0ae48d04bfc 100644

--- a/.travis.yml

+++ b/.travis.yml

@@ -11,8 +11,16 @@

matrix:

include:

 - env: NIX_CHANNEL=https://nixos.org/channels/nixpkgs-unstable

•  os: linux
  

 - env: NIX_CHANNEL=https://nixos.org/channels/nixos-unstable

•  os: linux
  

 - env: NIX_CHANNEL=https://nixos.org/channels/nixos-20.03

•  os: linux
  

• • env: NIX_CHANNEL=https://nixos.org/channels/nixpkgs-unstable

•  os: osx
  

• allow_failures:

• • env: NIX_CHANNEL=https://nixos.org/channels/nixpkgs-unstable

•  os: osx
  

cache:

directories:

@@ -27,6 +35,8 @@ - sudo mkdir -p /etc/nix

• echo "trusted-users = root $USER" | sudo tee -a /etc/nix/nix.conf

• echo 'require-sigs = false' | sudo tee -a /etc/nix/nix.conf > /dev/null

• echo "substituters = https://cache.nixos.org/ https://${CACHIX_CACHE}.cachix.org https://cachix.cachix.org file://$HOME/nix.store" | sudo tee -a /etc/nix/nix.conf > /dev/null

• • if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then sudo launchctl stop ors.nixos.nix-daemon; fi

• • if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then sudo launchctl start ors.nixos.nix-daemon && sleep 5; fi

install:

• nix --version