diff --git a/pkgs/by-name/ni/nixos-install-tools/package.nix b/pkgs/by-name/ni/nixos-install-tools/package.nix
index 03be3c9ea39b..98588f4abc54 100644
--- a/pkgs/by-name/ni/nixos-install-tools/package.nix
+++ b/pkgs/by-name/ni/nixos-install-tools/package.nix
@@ -56,9 +56,9 @@ in
           '';
         }
         ''
-          nixos-install --help | grep -F 'NixOS Reference Pages'
+          nixos-install --help | grep -F "System Manager's Manual"
           nixos-install --help | grep -F 'configuration.nix'
-          nixos-generate-config --help | grep -F 'NixOS Reference Pages'
+          nixos-generate-config --help | grep -F "System Manager's Manual"
           nixos-generate-config --help | grep -F 'hardware-configuration.nix'
 
           # FIXME: Tries to call unshare, which it must not do for --help