diff --git a/python/python3-Flask-RESTX/python3-Flask-RESTX.SlackBuild b/python/python3-Flask-RESTX/python3-Flask-RESTX.SlackBuild
index a0637fd4c0..c45510a95a 100644
--- a/python/python3-Flask-RESTX/python3-Flask-RESTX.SlackBuild
+++ b/python/python3-Flask-RESTX/python3-Flask-RESTX.SlackBuild
@@ -25,7 +25,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=python3-Flask-RESTX
-SRCNAM=$(echo ${PRGNAM,,} | sed "s/python3-//")
+SRCNAM=${PRGNAM#python3-*}
 VERSION=${VERSION:-1.1.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
@@ -67,9 +67,9 @@ set -e
 rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
-rm -rf $SRCNAM-$VERSION
-tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
-cd $SRCNAM-$VERSION
+rm -rf ${SRCNAM,,}-$VERSION
+tar xvf $CWD/${SRCNAM,,}-$VERSION.tar.gz
+cd ${SRCNAM,,}-$VERSION
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \