--- ./configure.orig	2025-01-22 07:22:22.309483203 +0000
+++ ./configure	2025-01-22 07:24:11.825224432 +0000
@@ -48,12 +48,12 @@
 my @bad = ();
 my $shell = check_shell_vers();
 if ( ! $opt_nomake ) {
-	my $no_bash = (grep {/bash/} @bad and ! $opt_all_completions);
-	my $no_zsh = (grep {/zsh/} @bad and ! $opt_all_completions);
+	my $no_bash = ($opt_all_completions or ! grep {/bash/} @bad);
+	my $no_zsh = ($opt_all_completions or ! grep {/zsh/} @bad);
 	open OUT, ">Makefile";
 	while (<DATA>) {
-		next if /bash_complete_dir/ and $no_bash;
-		next if /zsh\/site-functions/ and $no_zsh;
+		next if $no_bash and /bash_complete_dir/;
+		next if $no_zsh and /zsh\/site-functions/;
 		s/opt_prefix/$prefix/;
 		if ($bash_complete_dir and ! $opt_prefix) {
 			s/mkdir.*bash-completion.*/mkdir -p $bash_complete_dir/;