diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix
index 60b5a48b2e62..8ca4ad7b7d86 100644
--- a/nixos/modules/tasks/network-interfaces.nix
+++ b/nixos/modules/tasks/network-interfaces.nix
@@ -1451,7 +1451,7 @@ in
           sysctl-value = tempaddrValues.${cfg.tempAddresses}.sysctl;
         in ''
           # enable and prefer IPv6 privacy addresses by default
-          ACTION=="add", SUBSYSTEM=="net", RUN+="${pkgs.bash}/bin/sh -c 'echo ${sysctl-value} > /proc/sys/net/ipv6/conf/%k/use_tempaddr'"
+          ACTION=="add", SUBSYSTEM=="net", RUN+="${pkgs.bash}/bin/sh -c 'echo ${sysctl-value} > /proc/sys/net/ipv6/conf/$name/use_tempaddr'"
         '';
       })
       (pkgs.writeTextFile rec {