diff --git a/.travis.yml b/.travis.yml
index ef6bb3289d8553e7a03adbd0ada799b786fa2bb4..8d0173216d91ed396d538500ea5909ffc83efda8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
-version: ~> 1.0
+language: nix
-import: nix-community/nix-travis-ci:nix.yml@main
+nix: 2.3.4
 
 sudo: false
 
@@ -13,21 +13,33 @@     # Example: mycache (for mycache.cachix.org)
     #
     # For this to work, you also need to set the  CACHIX_SIGNING_KEY
     # in your repository settings in Travis.
-    # - CACHIX_CACHE=
+    - CACHIX_CACHE=
     # Set this to notify the global nur package registry that changes are
     # available.
     #
     # The repo name as used in
     # https://github.com/nix-community/NUR/blob/master/repos.json
-    - NUR_REPO="<YOUR_NUR_REPO_NAME_HERE>"
+    - NUR_REPO=<YOUR_NUR_REPO_NAME_HERE>
 
 matrix:
   include:
-    - env: NIX_PATH=nixpkgs=channel:nixpkgs-unstable
+    - env: NIX_CHANNEL=https://nixos.org/channels/nixpkgs-unstable
-import: nix-community/nix-travis-ci:nix.yml@main
 
+    #
+    - env: NIX_CHANNEL=https://nixos.org/channels/nixos-20.03
+
+install:
+sudo: false
 import: nix-community/nix-travis-ci:nix.yml@main
 sudo: false
+
+ - echo "trusted-users = $USER" | sudo tee -a /etc/nix/nix.conf
+ - sudo systemctl restart nix-daemon
+ - if [ -n "${CACHIX_CACHE}" ]; then travis_retry nix-channel --update; 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
 
 script:
  - nix-build ci.nix -A buildOutputs
@@ -37,6 +48,6 @@  - nix eval -f default.nix 'overlays'
 
 after_success:
   - if [ -n "${CACHIX_CACHE}" ]; then nix-build ci.nix -A cacheOutputs | cachix push "${CACHIX_CACHE}"; fi
-  - if [[ NUR_REPO != "<YOUR_NUR_REPO_NAME_HERE>" && "cron" != "${TRAVIS_EVENT_TYPE}" && "false" = "${TRAVIS_PULL_REQUEST}" && "master" = "${TRAVIS_BRANCH}" ]]; then
+  - if [ "cron" != "${TRAVIS_EVENT_TYPE}" -a "false" = "${TRAVIS_PULL_REQUEST}" -a "master" = "${TRAVIS_BRANCH}" ]; then
       curl -XPOST "https://nur-update.herokuapp.com/update?repo=${NUR_REPO}"; fi