diff --git a/ci/niv-cron.nix b/ci/niv-cron.nix
index fe0f0dab..652d504b 100644
--- a/ci/niv-cron.nix
+++ b/ci/niv-cron.nix
@@ -29,7 +29,7 @@ with lib; {
             chmod 0600 ~/.ssh/id_rsa
             for source in ${toString (attrNames sources)}; do
               if nix run -f . pkgs.niv  -c niv update $source; then
-                echo $(nix eval --raw "(import ./.).sources.$source") | ${cachix}/bin/cachix push kittywitch
+                echo $(nix eval --raw "(import ./.).sources.$source.outPath") | ${cachix}/bin/cachix push kittywitch
               fi
             done
             cachix push kittywitch $(nix eval --raw -f ../. sourceCache)
diff --git a/default.nix b/default.nix
index 09e56af7..5678a5be 100644
--- a/default.nix
+++ b/default.nix
@@ -19,7 +19,7 @@ rec {
 
     runners = import ./runners.nix { inherit lib; inherit (deploy) target; };
 
-  sourceCache = toString (lib.mapAttrsToList(sourceName: value: "${value}") (removeAttrs (import sources.nix-hexchen {}).sources [ "__functor" ]));
+  sourceCache = toString (lib.mapAttrsToList(sourceName: value: value.outPath) (removeAttrs (import sources.nix-hexchen {}).sources [ "__functor" ]));
 
   deploy = import ./lib/deploy.nix {
     inherit pkgs sources;