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-rwxr-xr-xshare/spack/setup-env.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/share/spack/setup-env.sh b/share/spack/setup-env.sh
index f602ea627e..943db72612 100755
--- a/share/spack/setup-env.sh
+++ b/share/spack/setup-env.sh
@@ -58,7 +58,7 @@
function spack {
# Zsh does not do word splitting by default, this enables it for this function only
- if [ -n "$ZSH_VERSION" ]; then
+ if [ -n "${ZSH_VERSION:-}" ]; then
emulate -L sh
fi