diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dc88740..9755e68 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,7 +28,7 @@ build:
                 - MOSQ_SRC=`pwd`/parts/mosquitto
                 - BUILD_DIR=`pwd`
                 - pushd parts/mosquitto 
-                - sed -i 's,prefix=/usr/local,prefix=/opt,' config.mk 
+                - sed -i 's,prefix?=/usr/local,prefix=/opt,' config.mk 
                 - sed -i 's,WITH_WEBSOCKETS:=no,WITH_WEBSOCKETS:=yes,' config.mk 
                 - env DESTDIR=$BUILD_DIR make 
                 - env DESTDIR=$BUILD_DIR make install 
diff --git a/readme.md b/readme.md
index c43301c..ac902fb 100644
--- a/readme.md
+++ b/readme.md
@@ -1,6 +1,6 @@
 # Docker Image containing the Mosquitto MQTT Broker and the mosquitto-auth-plug
 
-This project includes the mosquitto MQTT broker (https://github.com/eclipse/mosquitto, forked into https://github.com/wollud1969/mosquitto, see also https://mosquitto.org/) and the mosquitto-auth-plug (https://github.com/jpmens/mosquitto-auth-plug, forked into https://github.com/wollud1969/mosquitto-auth-plug) as submodules.
+This project includes the mosquitto MQTT broker (https://github.com/eclipse/mosquitto, see also https://mosquitto.org/) and the mosquitto-auth-plug (https://github.com/jpmens/mosquitto-auth-plug, forked into https://github.com/wollud1969/mosquitto-auth-plug) as submodules.
 
 Using Gitlab CI and a Dockerfile included in this project a Docker image based on Debian Linux is created.