mg: fix clens include path for nonstandard prefix

Fixes #28641.

1 files changed, 5 insertions, 0 deletions

diff --git a/Library/Formula/mg.rb b/Library/Formula/mg.rb
index 43881f4b2..6f522c66e 100644
--- a/Library/Formula/mg.rb
+++ b/Library/Formula/mg.rb
@@ -8,6 +8,11 @@ class Mg < Formula
   depends_on 'clens'
 
   def install
+    # makefile hardcodes include path to clens; since it's a
+    # nonstandard path, Homebrew's standard include paths won't
+    # fix this for people with nonstandard prefixes.
+    inreplace 'Makefile', '/usr/local', prefix
+
     system "make"
     bin.install "mg"
     doc.install "tutorial"