diff --git a/scripts/ci.sh b/scripts/ci.sh
index 5a56b08..6d3d013 100755
--- a/scripts/ci.sh
+++ b/scripts/ci.sh
@@ -5,6 +5,14 @@ set -euxo pipefail
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 REPO_ROOT="$SCRIPT_DIR/.."
 
+# Set image versions in the environment before running this script:
+# export ZKLLVM_VERSION=0.0.58
+# export TOOLCHAIN_VERSION=0.0.31
+
+# If unset, default values will be used:
+echo "using nilfoundation/zkllvm-template:${ZKLLVM_VERSION:=0.0.58}"
+echo "using nilfoundation/proof-market-toolchain:${TOOLCHAIN_VERSION:=0.0.31}"
+
 # podman is a safer option for using on CI machines
 if ! command -v podman; then
     DOCKER="docker"