diff --git a/tools/mkauthors b/tools/mkauthors
index 66e9ac0c0..3d6753c80 100755
--- a/tools/mkauthors
+++ b/tools/mkauthors
@@ -54,7 +54,9 @@ for my $author (sort { $authors{$b} <=> $authors{$a} or lc($a) cmp lc($b) } keys
 }
 close $fh;
 
-execute 'git', 'commit',
-	'--author', 'InspIRCd Robot <noreply@inspircd.org>',
-	'--message', 'Update author list.',
-	'--', $author_file;
+if ($ENV{MKAUTHORS_COMMIT} // 1) {
+	execute 'git', 'commit',
+		'--author', 'InspIRCd Robot <noreply@inspircd.org>',
+		'--message', 'Update author list.',
+		'--', $author_file;
+}
diff --git a/tools/mkheaders b/tools/mkheaders
index 27577fbbc..e254fb415 100755
--- a/tools/mkheaders
+++ b/tools/mkheaders
@@ -152,7 +152,9 @@ for my $path (@paths) {
 	}
 }
 
-execute 'git', 'commit',
-	'--author', 'InspIRCd Robot <noreply@inspircd.org>',
-	'--message', 'Update copyright headers.',
-	'--', @updated;
+if ($ENV{MKHEADERS_COMMIT} // 1) {
+	execute 'git', 'commit',
+		'--author', 'InspIRCd Robot <noreply@inspircd.org>',
+		'--message', 'Update copyright headers.',
+		'--', @updated;
+}