diff --git a/Library/Homebrew/shims/mac/super/ant b/Library/Homebrew/shims/mac/super/ant
index 3d686024e5..835586479a 100755
--- a/Library/Homebrew/shims/mac/super/ant
+++ b/Library/Homebrew/shims/mac/super/ant
@@ -1,7 +1,9 @@
 #!/bin/bash
 
-export HOMEBREW_CCCFG="O$HOMEBREW_CCCFG"
+export HOMEBREW_CCCFG="O${HOMEBREW_CCCFG}"
 
 ant=/usr/bin/ant
-[[ -x "$ant" ]] || ant="$("$HOMEBREW_BREW_FILE" --prefix ant)/bin/ant"
-exec "$ant" "$@"
+# HOMEBREW_BREW_FILE is set by bin/brew
+# shellcheck disable=SC2154
+[[ -x "${ant}" ]] || ant="$("${HOMEBREW_BREW_FILE}" --prefix ant)/bin/ant"
+exec "${ant}" "$@"