diff --git a/gentoo b/gentoo
index 9a55a2f5f280f003c1486bf219815fb1038c8a17..4f53bf7e29ec7f50a970c4af4bdc858bfe9bb725 100644
--- a/gentoo
+++ b/gentoo
@@ -1,8 +1,8 @@
 FROM gentoo/stage3-amd64
-ENV ACCEPT_KEYWORDS ~amd64 \
-    EMERGE_DEFAULT_OPTS --buildpkg --jobs=9 --load-average=8 --quiet y --quiet-build y --with-bdeps=y --usepkg \
+ENV ACCEPT_KEYWORDS="~amd64" \
+    EMERGE_DEFAULT_OPTS="--buildpkg --jobs=9 --load-average=8 --quiet y --quiet-build y --with-bdeps=y --usepkg" \
     MAKEOPTS="-j9 -l8" \
-    USE cairo introspection jpeg tiff
+    USE="cairo introspection jpeg tiff"
 
 RUN mkdir -p /usr/portage \
 &&  emerge-webrsync --quiet \