diff --git a/bin/discovery-installer b/bin/discovery-installer
index 0393d9e..c273596 100755
--- a/bin/discovery-installer
+++ b/bin/discovery-installer
@@ -4,7 +4,7 @@
 #
 export VERBOSE="n"
 INSTALLER_COMMAND="discovery-installer"
-DISCOVERY_PKG_ROOT=/usr/share/${INSTALLER_COMMAND}
+DISCOVERY_PKG_ROOT="${DISCOVERY_PKG_ROOT:-/usr/share/${INSTALLER_COMMAND}}"
 DISCOVERY_BIN_DIR=${DISCOVERY_PKG_ROOT}/bin
 
 CONFIG_PATH="${DISCOVERY_PKG_ROOT}/config"