diff --git a/make.conf/portage b/make.conf/portage
index 99616c5..60a331a 100644
--- a/make.conf/portage
+++ b/make.conf/portage
@@ -13,7 +13,7 @@ MAKEOPTS="-j7 -l8"
 # Format and compression.
 BINPKG_FORMAT="gpkg"
 PORTAGE_COMPRESS="xz"
-PORTAGE_COMPRESS_FLAGS="-9 -T6 --memlimit-decompress=1500M"
+PORTAGE_COMPRESS_FLAGS="-9e -T6 --memlimit-decompress=1500M"
 BINPKG_COMPRESS="${PORTAGE_COMPRESS}"
 BINPKG_COMPRESS_FLAGS="${PORTAGE_COMPRESS_FLAGS}"