diff --git a/bash/main.sh b/bash/main.sh
index 44c3910..63d91f2 100644
--- a/bash/main.sh
+++ b/bash/main.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-MAIN_SHELL_FILE="$(realpath "${BASH_SOURCE[0]}")"
+MAIN_SHELL_FILE="$(readlink --canonicalize-existing "${0}")"
 
 MAIN_SHELL_ROOT="$(dirname "${MAIN_SHELL_FILE}")"