diff --git a/util.go b/util.go
index b0903fb..2e6e56d 100644
--- a/util.go
+++ b/util.go
@@ -62,7 +62,11 @@ func absPathify(inPath string) string {
 
 	if strings.HasPrefix(inPath, "$") {
 		end := strings.Index(inPath, string(os.PathSeparator))
-		inPath = os.Getenv(inPath[1:end]) + inPath[end:]
+		if end == -1 {
+			inPath = os.Getenv(inPath[1:])
+		} else {
+			inPath = os.Getenv(inPath[1:end]) + inPath[end:]
+		}
 	}
 
 	if filepath.IsAbs(inPath) {