diff --git a/ShellB3/shallbethree.sh b/ShellB3/shallbethree.sh
index 59912038ff74c615d340aafc2c6d69f19ffe168a..4b6ad3918099c3bcdf6b4bc62f02cc7a9729edaa 100755
--- a/ShellB3/shallbethree.sh
+++ b/ShellB3/shallbethree.sh
@@ -4449,7 +4449,7 @@ mk_pykdtree() {
 
 mk_pyyaml() {
   resume_tracker && return 0
-  _setup_build_install pyyaml src/optional/PyYAML-${PYYAMLVER}.tar.gz pyyaml-${PYYAMLVER}
+  _setup_build_install pyyaml src/optional/PyYAML-${PYYAMLVER}.tar.gz PyYAML-${PYYAMLVER}
 }
 
 mk_pyresample() {