diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f7ec87355e0..32cfe9c8542 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19326,7 +19326,9 @@ in
 
   sysklogd = callPackage ../os-specific/linux/sysklogd { };
 
-  syslinux = callPackage ../os-specific/linux/syslinux { };
+  syslinux = callPackage ../os-specific/linux/syslinux {
+    stdenv = gcc9Stdenv; # Fails with "undefined reference to `strlen'" on gcc10
+  };
 
   sysstat = callPackage ../os-specific/linux/sysstat { };