diff --git a/Jenkinsfile b/Jenkinsfile
index b36279be98..0714b8ebcb 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -146,7 +146,7 @@ def build_channel(String channel_name) {
   return parallel (
     "${channel_name} (git)": {
       deviceStage("build git", "tici-needs-can", [], [
-        ["build ${channel_name}", "RELEASE=1 OPENPILOT_CHANNEL=${channel_name} $SOURCE_DIR/release/build_git_channel.sh"],
+        ["build ${channel_name}", "RELEASE=1 OPENPILOT_CHANNEL=${channel_name} BUILD_DIR=/data/openpilot_build $SOURCE_DIR/release/build_git_channel.sh"],
       ])
     },
     "${channel_name} (casync)": {
diff --git a/release/build_casync_channel.sh b/release/build_casync_channel.sh
index 87f70f5bfc..8b820fac89 100755
--- a/release/build_casync_channel.sh
+++ b/release/build_casync_channel.sh
@@ -4,9 +4,9 @@ set -ex
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
 
-export CASYNC_DIR="${CASYNC_DIR:=/tmp/casync}"
-export SOURCE_DIR="$(git -C $DIR rev-parse --show-toplevel)"
-export BUILD_DIR="${BUILD_DIR:=$(mktemp -d)}"
+CASYNC_DIR="${CASYNC_DIR:=/tmp/casync}"
+SOURCE_DIR="$(git -C $DIR rev-parse --show-toplevel)"
+BUILD_DIR="${BUILD_DIR:=$(mktemp -d)}"
 
 echo "Creating casync channel from $SOURCE_DIR to $CASYNC_DIR"
 
diff --git a/release/build_git_channel.sh b/release/build_git_channel.sh
index 2b1dbb6a3a..a482e04eaf 100755
--- a/release/build_git_channel.sh
+++ b/release/build_git_channel.sh
@@ -6,8 +6,8 @@ DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
 
 cd $DIR
 
-BUILD_DIR=/data/openpilot
-SOURCE_DIR="$(git rev-parse --show-toplevel)"
+SOURCE_DIR="$(git -C $DIR rev-parse --show-toplevel)"
+BUILD_DIR="${BUILD_DIR:=$(mktemp -d)}"
 
 # set git identity
 source $DIR/identity.sh