fix package versioning

1 files changed, 1 insertions, 1 deletions

diff --git a/PKGBUILD b/PKGBUILD
index 687a5f0acbc5..254506283cf1 100755
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -17,7 +17,7 @@ sha256sums=('SKIP')
 
 pkgver() {
   cd harfbuzz
-  git describe --long | sed 's/([^-]*-g)/r\1/;s/-/./g'
+  git describe --long | sed -r 's/([^-]*-g)/r\1/;s/-/./g'
 }
 
 prepare() {