diff --git a/nix/build-docker-ci.sh b/nix/build-docker-ci.sh
index bc28d5108..bb0b236f1 100755
--- a/nix/build-docker-ci.sh
+++ b/nix/build-docker-ci.sh
@@ -3,7 +3,6 @@ set -e
 
 # Configure cache
 ./setup-cache.sh
-export NIX_PATH=$GIT_NIX_PATH$NIX_PATH
 
 # Minimal nsswitch.conf
 [[ ! -e /etc/nsswitch.conf ]] && echo 'hosts: files dns' > /etc/nsswitch.conf
@@ -37,8 +36,8 @@ echo "git tag: $gittag"
 echo "git event: $gitevent"
 
 containers=$(nix-build containers.nix --arg isProd true \
-  --arg containerTag \"$tag\" \
-  --arg prefixName \"registry.hxr.team/\" )
+  --argstr containerTag "$tag" \
+  --argstr prefixName registry.hxr.team )
 
 for container in $containers
 do