diff --git a/docs/development/plugin-triggers.md b/docs/development/plugin-triggers.md
index e63fff4ef..cf86711fb 100644
--- a/docs/development/plugin-triggers.md
+++ b/docs/development/plugin-triggers.md
@@ -745,7 +745,7 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 
 - Description: Allows you to run commands after the build image is create for a given app. Only applies to apps using buildpacks.
 - Invoked by: `internal function dokku_build() (build phase)`
-- Arguments: `$APP`
+- Arguments: `$APP` `$SOURCECODE_WORK_DIR`
 - Example:
 
 ```shell
@@ -1005,7 +1005,7 @@ dokku config:set --no-restart $APP MANUALLY_STOPPED=1
 
 - Description: Allows you to run commands before the build image is created for a given app. For instance, this can be useful to add env vars to your container. Only applies to apps using buildpacks.
 - Invoked by: `internal function dokku_build() (build phase)`
-- Arguments: `$APP`
+- Arguments: `$APP` `$SOURCECODE_WORK_DIR`
 - Example:
 
 ```shell
diff --git a/plugins/builder-herokuish/builder-build b/plugins/builder-herokuish/builder-build
index 61194b8a6..d7d231927 100755
--- a/plugins/builder-herokuish/builder-build
+++ b/plugins/builder-herokuish/builder-build
@@ -33,7 +33,7 @@ trigger-builder-build-builder-herokuish() {
 
   "$DOCKER_BIN" commit "${DOCKER_COMMIT_LABEL_ARGS[@]}" "$CID" "$IMAGE" >/dev/null
   [[ -d $DOKKU_APP_CACHE_DIR ]] || mkdir -p "$DOKKU_APP_CACHE_DIR"
-  plugn trigger pre-build-buildpack "$APP"
+  plugn trigger pre-build-buildpack "$APP" "$SOURCECODE_WORK_DIR"
 
   local DOCKER_ARGS=$(: | plugn trigger docker-args-build "$APP" "$BUILDER_TYPE")
   [[ "$DOKKU_TRACE" ]] && DOCKER_ARGS+=" -e TRACE=true "
@@ -48,7 +48,7 @@ trigger-builder-build-builder-herokuish() {
 
   "$DOCKER_BIN" commit "${DOCKER_COMMIT_LABEL_ARGS[@]}" "$CID" "$IMAGE" >/dev/null
 
-  plugn trigger post-build-buildpack "$APP"
+  plugn trigger post-build-buildpack "$APP" "$SOURCECODE_WORK_DIR"
 }
 
 trigger-builder-build-builder-herokuish "$@"