diff --git a/scripts/init-submodules-no-riscv-tools-nolog.sh b/scripts/init-submodules-no-riscv-tools-nolog.sh
index cede5e47d3..c861658dfa 100755
--- a/scripts/init-submodules-no-riscv-tools-nolog.sh
+++ b/scripts/init-submodules-no-riscv-tools-nolog.sh
@@ -77,6 +77,6 @@ if [ ! -f ./software/firemarshal/marshal-config.yaml ]; then
 fi
 
 echo "# line auto-generated by init-submodules-no-riscv-tools.sh" >> env.sh
-echo '__DIR="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"' >> env.sh
+echo '__DIR="$(dirname "$(readlink -f "${BASH_SOURCE[0]:-${(%):-%x}}")")"' >> env.sh
 echo "PATH=\$__DIR/bin:\$PATH" >> env.sh
 echo "PATH=\$__DIR/software/firemarshal:\$PATH" >> env.sh