diff --git a/ci.sh b/ci.sh
index a19f2af18..dcf7ada6d 100755
--- a/ci.sh
+++ b/ci.sh
@@ -1,20 +1,23 @@
 #!/bin/sh
 
 # only execute this script as part of the pipeline.
-[ -z $CI ] && echo "missing ci enviornment variable" && exit 2
+[ -z "$CI" ] && echo "missing ci enviornment variable" && exit 2
 
 # only execute the script when github token exists.
-[ -z $SSH_KEY ] && echo "missing ssh key" && exit 3
+[ -z "$SSH_KEY" ] && echo "missing ssh key" && exit 3
 
-# write a netrc file for authorization.
+# write the ssh key.
 mkdir /root/.ssh
 echo -n "$SSH_KEY" > /root/.ssh/id_rsa
 chmod 600 /root/.ssh/id_rsa
 
+# write the ssh configuration.
+echo "SG9zdCAqDQpTdHJpY3RIb3N0S2V5Q2hlY2tpbmcgbm8gDQpVc2VyS25vd25Ib3N0c0ZpbGU9L2Rldi9udWxsIA==" | base64 -d > /root/.ssh/config
+
 # clone the extras project.
 set -e
 set -x
-GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no" git clone git@github.com:drone/drone-enterprise.git extras
+git clone git@github.com:drone/drone-enterprise.git extras
 
 # build a static binary with the build number and extra features.
 go build -ldflags '-extldflags "-static" -X github.com/drone/drone/version.VersionDev=build.${DRONE_BUILD_NUMBER}' -tags extras -o release/drone github.com/drone/drone/drone