diff --git a/entrypoint.sh b/entrypoint.sh
index 3a664ce..a67f2d9 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -7,7 +7,9 @@ die() {
 
 set -e
 
-if [ ! -r /var/lib/catalyst/store/builds/default/stage3-amd64-latest.tar.xz ]
+BUILDDIR=/var/lib/catalyst/store/builds/default
+
+if [ ! -r ${BUILDDIR}/stage3-amd64-latest.tar.xz ]
 then
     # Get latest stage3 tag
     STAGE3_TAG=$(wget -q -O - \
@@ -17,15 +19,15 @@ then
     # Download latest stable stage3 build
     wget -q -N -P /var/lib/catalyst/store/builds/ \
         http://distfiles.gentoo.org/releases/amd64/autobuilds/${STAGE3_TAG} \
-        -O /var/lib/catalyst/store/builds/default/stage3-amd64-latest.tar.xz
+        -O ${BUILDDIR}/stage3-amd64-latest.tar.xz
 
     wget -q -N -P /var/lib/catalyst/store/builds/ \
         http://distfiles.gentoo.org/releases/amd64/autobuilds/${STAGE3_TAG}.CONTENTS \
-        -O /var/lib/catalyst/store/builds/default/stage3-amd64-latest.tar.xz.CONTENTS
+        -O ${BUILDDIR}/stage3-amd64-latest.tar.xz.CONTENTS
 
     wget -q -N -P /var/lib/catalyst/store/builds/ \
         http://distfiles.gentoo.org/releases/amd64/autobuilds/${STAGE3_TAG}.DIGESTS \
-        -O /var/lib/catalyst/store/builds/default/stage3-amd64-latest.tar.xz.DIGESTS
+        -O ${BUILDDIR}/stage3-amd64-latest.tar.xz.DIGESTS
 fi
 
 # Download latest portage snapshot