diff --git a/misc/yosys-config.in b/misc/yosys-config.in
index 370835f8f..a31ef38c2 100644
--- a/misc/yosys-config.in
+++ b/misc/yosys-config.in
@@ -6,7 +6,7 @@ help() {
 		echo "Usage: $0 [--exec] [--prefix pf] args.."
 		echo "       $0 --build modname.so cppsources.."
 		echo ""
-		echo "Replecement args:"
+		echo "Replacement args:"
 		echo "    --cxx         @CXX@"
 		echo "    --cxxflags    $( echo '@CXXFLAGS@' | fmt -w60 | sed ':a;N;$!ba;s/\n/ \\\n                      /g' )"
 		echo "    --ldflags     @LDFLAGS@"
diff --git a/tests/various/plugin.sh b/tests/various/plugin.sh
index d6d4aee59..2880c8c06 100644
--- a/tests/various/plugin.sh
+++ b/tests/various/plugin.sh
@@ -1,6 +1,8 @@
 set -e
 rm -f plugin.so
 CXXFLAGS=$(../../yosys-config --cxxflags)
-CXXFLAGS=${CXXFLAGS// -I\/usr\/local\/share\/yosys\/include/ -I..\/..\/share\/include}
+DATDIR=$(../../yosys-config --datdir)
+DATDIR=${DATDIR//\//\\\/}
+CXXFLAGS=${CXXFLAGS//$DATDIR/..\/..\/share}
 ../../yosys-config --exec --cxx ${CXXFLAGS} --ldflags -shared -o plugin.so plugin.cc
 ../../yosys -m ./plugin.so -p "test" | grep -q "Plugin test passed!"