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diff --git a/.travis.yml b/.travis.yml
index d39802d69b3a5b35686ca63a8d66a0a964fc7a0d..430eb1af067978fbf14789cb3c95c752e797bc86 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,20 @@ sudo: false
 
 env:
   global:
+    # Set this to cache your build results in cachix for faster builds
+    # in travis and for everyone who uses your cache.
+    #
+    # Format: Your cachix cache host name without the ".cachix.org" suffix.
+    # 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=
+    # 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>
 
 matrix:

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diff --git a/README.md b/README.md
index f1b2c4e054fd63b51b5831c8ac50a328fea6e378..e719544e5110e86096350842128190e26732fdd4 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,6 @@      attribute, or travis (and consequently caching) will fail!
    * Library functions, modules and overlays go in the respective directories
 3. Add your NUR repo name and your cachix repo name (optional) to
    [.travis.yml](./.travis.yml)
-   * If you use cachix you should also add your cache's private key to travis'
-     protected env variables
 4. Enable travis for your repo
    * You can add a cron job in the repository settings on travis to keep your
      cachix cache fresh