diff --git a/leaf b/leaf
index 05660d7..da4f94d 100755
--- a/leaf
+++ b/leaf
@@ -19,7 +19,9 @@ else
 fi
 export MAKEFLAGS="-j${PARALLEL_JOBS}"
 export NINJAJOBS="${PARALLEL_JOBS}"
-export LC_ALL=C
+export TESTSUITEFLAGS="-j${PARALLEL_JOBS}"
+export LANG=C
+export LC_CTYPE=C.UTF-8
 export leaf_flags="CFLAGS CXXFLAGS FCFLAGS FFLAGS RUSTFLAGS"
 for flag in ${leaf_flags}; do
   export $flag
@@ -66,9 +68,15 @@ main() {
           fi
           leaf_parse_options
           srcdir="${BUILD_DIR}/${PKG_PREFIX}/${PKG_NAME}"
+          TMPDIR="${srcdir}/.leaf-tmp"
+          HOME="${srcdir}/.leaf-home"
+          export TMPDIR
+          export HOME
           pkgdir="${srcdir}"/__pkgdir__
           if [[ x"$1" != x"dirct-install" ]]; then
             rm -rf "${srcdir}" && install -dm755 "${srcdir}" && cd "${srcdir}"
+            mkdir -pv ${TMPDIR}
+            mkdir -pv ${HOME}
           fi
           leaf_${1}_package
         done