diff --git a/.travis.yml b/.travis.yml
index 110547a..f41f624 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,9 +12,9 @@ env:
 
 jobs:
   include:
-    # - env: NIX_PATH=nixpkgs=channel:nixpkgs-unstable
-    # - env: NIX_PATH=nixpkgs=channel:nixos-unstable
-    - env: NIX_PATH=nixpkgs=channel:nixos-20.03
+    - env: NIX_PATH=nixpkgs=channel:nixpkgs-unstable
+    - env: NIX_PATH=nixpkgs=channel:nixos-unstable
+    # - env: NIX_PATH=nixpkgs=channel:nixos-20.03
 
 script:
  - nix-build ci.nix -kA buildOutputs