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Diffstat (limited to 'pkgs/os-specific/linux/iptables/default.nix')
-rw-r--r--pkgs/os-specific/linux/iptables/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/os-specific/linux/iptables/default.nix b/pkgs/os-specific/linux/iptables/default.nix
index 912d9078c94..fe0e82c4a8e 100644
--- a/pkgs/os-specific/linux/iptables/default.nix
+++ b/pkgs/os-specific/linux/iptables/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "dev" ];
 
-  postInstall = optional nftablesCompat ''
+  postInstall = optionalString nftablesCompat ''
     rm $out/sbin/{iptables,iptables-restore,iptables-save,ip6tables,ip6tables-restore,ip6tables-save}
     ln -sv xtables-nft-multi $out/bin/iptables
     ln -sv xtables-nft-multi $out/bin/iptables-restore