lib/common-functions: fix error message

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/common-functions b/lib/common-functions
index 49d6f6f..5c2e333 100755
--- a/lib/common-functions
+++ b/lib/common-functions
@@ -478,7 +478,7 @@ extract_source_directory() {
     curl -o "$pkgtarfile" -fLSs "https://buildmaster.archlinux32.org/upstream-packages/${pkgbase_translated}-${revision}.tar.gz"
     res=$?
     if [ "$res" -ne 0 ]; then
-      >&2 echo 'Download upstream-package from upstream via buildmaster cache failed. Curl exit code was $res.'
+      >&2 printf 'Download upstream-package from upstream via buildmaster cache failed. Curl exit code was %s.' "${res}"
       return 1
     fi
     if [ -f "${pkgtarfile}" ]; then