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-rw-r--r--nixpkgs/pkgs/development/libraries/libiconv/setup-hook.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/libraries/libiconv/setup-hook.sh b/nixpkgs/pkgs/development/libraries/libiconv/setup-hook.sh
index f89361a62998..120cf06c61b5 100644
--- a/nixpkgs/pkgs/development/libraries/libiconv/setup-hook.sh
+++ b/nixpkgs/pkgs/development/libraries/libiconv/setup-hook.sh
@@ -2,7 +2,7 @@
 # it doesn't hurt to have it in Glibc either though
 
 # See pkgs/build-support/setup-hooks/role.bash
-if [ -z "$dontAddExtraLibs" ]; then
+if [ -z "${dontAddExtraLibs-}" ]; then
     getHostRole
     export NIX_${role_pre}LDFLAGS+=" -liconv"
 fi