diff --git a/Library/Homebrew/dev-cmd/pr-publish.rb b/Library/Homebrew/dev-cmd/pr-publish.rb
index f8da3b7b2f..c87973e4a8 100644
--- a/Library/Homebrew/dev-cmd/pr-publish.rb
+++ b/Library/Homebrew/dev-cmd/pr-publish.rb
@@ -21,6 +21,8 @@ module Homebrew
   def pr_publish
     pr_publish_args.parse
 
+    ENV["HOMEBREW_FORCE_HOMEBREW_ON_LINUX"] = "1" unless OS.mac?
+
     odie "You need to specify at least one pull request number!" if Homebrew.args.named.empty?
 
     args.named.each do |arg|