diff --git a/gentoo-base.Dockerfile b/gentoo-base.Dockerfile
index defa834..73ea737 100644
--- a/gentoo-base.Dockerfile
+++ b/gentoo-base.Dockerfile
@@ -22,6 +22,9 @@ RUN emerge --root=/workdir --buildpkg=y --usepkg --quiet \
     sys-apps/grep sys-apps/gawk app-arch/gzip sys-devel/gcc
 RUN mkdir -p /workdir/etc/portage \
     && cp /etc/portage/make.conf /workdir/etc/portage/make.conf
+RUN mkdir /workdir/etc/portage/repos.conf \
+    && echo -e '[gentoo]\nlocation = /var/db/repos/gentoo' \
+    > /workdir/etc/portage/repos.conf/gentoo.conf
 RUN rm -r /workdir/usr/lib/python*/{unit,}test
 
 # Final image.