diff --git a/go/src/auxents/repl/prompt.go b/go/src/auxents/repl/prompt.go
index 5aff36b9c..ddb470b41 100644
--- a/go/src/auxents/repl/prompt.go
+++ b/go/src/auxents/repl/prompt.go
@@ -20,12 +20,10 @@ const DEFAULT_PRIMARY_PROMPT = "[mlr] "
 const DEFAULT_SECONDARY_PROMPT = ""
 
 func getInputIsTerminal() bool {
-	if runtime.GOOS == "windows" {
+	if runtime.GOOS == "windows" && os.Getenv("MSYSTEM") != "" {
 		// Sadly, term.IsTerminal doesn't work inside MSYS2 but does work
-		// outside MSYS2.  Also sadly, I don't know how to tell the difference
-		// programatically between inside/outside MSYS2 here. So, as a
-		// workaround, I am simply defaulting to "is a terminal" here. Issues
-		// with regression-testing will need to be dealt with later.
+		// outside MSYS2. So in that case we simply return true so that the mlr
+		// repl has a prompt.
 		return true
 	} else {
 		return term.IsTerminal(int(os.Stdin.Fd()))