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-rw-r--r--pkgs/tools/networking/tcpdump/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/tools/networking/tcpdump/default.nix b/pkgs/tools/networking/tcpdump/default.nix
index 8dba4b373a32..5c6920487b7d 100644
--- a/pkgs/tools/networking/tcpdump/default.nix
+++ b/pkgs/tools/networking/tcpdump/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   crossAttrs = {
     LDFLAGS = if enableStatic then "-static" else "";
     configureFlags = [ "ac_cv_linux_vers=2" ] ++ (stdenv.lib.optional
-      (hostPlatform.platform.kernelMajor == "2.4") "--disable-ipv6");
+      (hostPlatform.platform.kernelMajor or null == "2.4") "--disable-ipv6");
   };
 
   meta = {