2 files changed, 2 insertions, 0 deletions
diff --git a/Library/Homebrew/cmd/install.rb b/Library/Homebrew/cmd/install.rb
index 24a00972c..2b1c577f0 100644
--- a/Library/Homebrew/cmd/install.rb
+++ b/Library/Homebrew/cmd/install.rb
@@ -114,6 +114,7 @@ module Homebrew extend self
     fi.interactive &&= :git if ARGV.flag? "--git"
     fi.verbose = ARGV.verbose?
     fi.verbose &&= :quieter if ARGV.quieter?
+    fi.debug = ARGV.debug?
     fi.prelude
     fi.install
     fi.caveats
diff --git a/Library/Homebrew/cmd/upgrade.rb b/Library/Homebrew/cmd/upgrade.rb
index 7138ea345..adcbf49b6 100644
--- a/Library/Homebrew/cmd/upgrade.rb
+++ b/Library/Homebrew/cmd/upgrade.rb
@@ -61,6 +61,7 @@ module Homebrew extend self
     installer.build_from_source = ARGV.build_from_source?
     installer.verbose = ARGV.verbose?
     installer.verbose &&= :quieter if ARGV.quieter?
+    installer.debug = ARGV.debug?
     installer.prelude
 
     oh1 "Upgrading #{f.name}"