diff --git a/Dockerfile b/Dockerfile
index d08630f1d..34f4571f5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,4 +34,5 @@ RUN chmod 0700 $XDG_RUNTIME_DIR
 COPY --chown=$MAMBA_USER:$MAMBA_USER_GID . /partis
 WORKDIR /partis
 RUN ./bin/build.sh
+ENV PATH /opt/conda/bin:/opt/conda/condabin:$PATH  # necessary for singularity
 CMD ./test/test.py --quick