diff --git a/vxmicro-env.bash b/vxmicro-env.bash
index 60bf7d7ed60..42a142bd014 100644
--- a/vxmicro-env.bash
+++ b/vxmicro-env.bash
@@ -9,7 +9,7 @@ fi
 # run (if it exists) by this script.
 
 # identify OS source tree root directory
-export VXMICRO_BASE=$(pwd)
+export VXMICRO_BASE=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 
 # prepend VxMicro build system tools to PATH, if not already present
 vxmicro_linux_bin=${VXMICRO_BASE}/host/x86-linux2/bin