diff --git a/python/python3-jsonschema/python3-jsonschema.SlackBuild b/python/python3-jsonschema/python3-jsonschema.SlackBuild
index 4cf1035aff..3c67f7a17a 100644
--- a/python/python3-jsonschema/python3-jsonschema.SlackBuild
+++ b/python/python3-jsonschema/python3-jsonschema.SlackBuild
@@ -29,7 +29,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=python3-jsonschema
-SRCNAM=$(echo $PRGNAM | sed -e "s/python3-//")
+SRCNAM=${PRGNAM#python3-*}
 VERSION=${VERSION:-4.17.3}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}