diff --git a/README.md b/README.md
index ee544c50..b822c496 100644
--- a/README.md
+++ b/README.md
@@ -200,6 +200,7 @@ Available arguments for `docker build`:
 * HUGO_CMD - Commands passed to Hugo during build. Default *empty*
 * HUGO_DESTINATION_ARG - Location of output folder. Default: `/target`
 * HUGO_ENV_ARG - Selecting environment ("DEV"/"production"). Default: `DEV`
+* HUGO_DIR - Selecting Hugo root directory. Default: `/src`
 
 
 ## Using CI image (0.77.0 or newer)
diff --git a/src/docker/_imports/onbuild.df b/src/docker/_imports/onbuild.df
index 9480f7f9..f09316f2 100644
--- a/src/docker/_imports/onbuild.df
+++ b/src/docker/_imports/onbuild.df
@@ -3,9 +3,11 @@ FROM main AS onbuild
 ONBUILD ARG HUGO_CMD
 ONBUILD ARG HUGO_DESTINATION_ARG
 ONBUILD ARG HUGO_ENV_ARG
+ONBUILD ARG HUGO_DIR
 
 ONBUILD ENV HUGO_DESTINATION="${HUGO_DESTINATION_ARG:-/target}" \
             HUGO_ENV="${HUGO_ENV_ARG:-DEV}"
 
 ONBUILD COPY . /src
+ONBUILD WORKDIR ${HUGO_DIR:-/src}
 ONBUILD RUN hugo ${HUGO_CMD}