diff --git a/scripts/production-release-drill.sh b/scripts/production-release-drill.sh
index 9ad1cbd..5678ebd 100755
--- a/scripts/production-release-drill.sh
+++ b/scripts/production-release-drill.sh
@@ -13,8 +13,6 @@ current_commit=1111111111111111111111111111111111111111
 target_commit=2222222222222222222222222222222222222222
 release_confirmation="whoneedhelp.com:$target_commit"
 forward_confirmation="whoneedhelp.com:$target_commit:forward-only"
-mock_candidate_id="sha256:$(printf 'who-need-help-release-drill-candidate' | sha256sum | awk '{print $1}')"
-
 cleanup() {
   status=$?
   trap - EXIT HUP INT TERM
@@ -62,6 +60,7 @@ printf '%s  %s\n' "$bundle_hash" "$(basename -- "$bundle")" >"$bundle.sha256"
 image_archive="$fixture/output/releases/incoming/who_need_help-$target_commit-images-linux-amd64.tar.gz"
 printf 'isolated release drill image archive\n' | gzip -n >"$image_archive"
 image_hash=$(sha256sum "$image_archive" | awk '{print $1}')
+fixture_candidate_id="sha256:$image_hash"
 printf '%s  %s\n' "$image_hash" "$(basename -- "$image_archive")" \
   >"$image_archive.sha256"
 image_manifest="$fixture/output/releases/incoming/who_need_help-$target_commit-images.manifest"
@@ -71,7 +70,7 @@ printf '%s\n' \
   'platform=linux/amd64' \
   'topology=compact' \
   'image_count=1' \
-  "image=who-need-help:production-${target_commit:0:12}|$mock_candidate_id" \
+  "image=who-need-help:production-${target_commit:0:12}|$fixture_candidate_id" \
   >"$image_manifest"
 backup="$fixture/output/backups/production/pre-release.dump"
 printf 'isolated release drill backup\n' >"$backup"
@@ -195,7 +194,7 @@ if [ "$1" = inspect ]; then
           "$MOCK_ENV_FILE"
       fi
       ;;
-    '{{.Image}}') printf '%s\n' "$MOCK_CANDIDATE_ID" ;;
+    '{{.Image}}') printf '%s\n' "$FIXTURE_CANDIDATE_ID" ;;
     *) exit 1 ;;
   esac
   exit 0
@@ -203,7 +202,7 @@ fi
 if [ "$1" = image ] && [ "$2" = inspect ] &&
   [ "$3" = --format ]; then
   case "$4" in
-    '{{.Id}}') printf '%s\n' "$MOCK_CANDIDATE_ID" ;;
+    '{{.Id}}') printf '%s\n' "$FIXTURE_CANDIDATE_ID" ;;
     '{{.Os}}/{{.Architecture}}') printf 'linux/amd64\n' ;;
     *) exit 1 ;;
   esac
@@ -231,7 +230,7 @@ container_env=(
   --env "MOCK_GIT_STATE=$remote_root/git-state"
   --env "MOCK_COMMAND_LOG=$remote_root/mock-commands.log"
   --env "MOCK_ENV_FILE=$remote_root/.env"
-  --env "MOCK_CANDIDATE_ID=$mock_candidate_id"
+  --env "FIXTURE_CANDIDATE_ID=$fixture_candidate_id"
   --env "PATH=/mock-bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
 )
 container_mounts=(