diff --git a/Dockerfile b/Dockerfile
index e8361e1..3c3a25e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,9 +9,7 @@ RUN apt-get update \
 		gawk subversion mercurial wget gettext \
 	&& rm -rf /var/lib/apt/lists/*
 
-ENV OPENWRT_RELEASE=v15.05.1 \
-	OPENWRT_TARGET=rpi3 \
-	WORKDIR=/usr/local/openwrt
+ENV WORKDIR=/usr/local/openwrt
 
 VOLUME ["$WORKDIR/src"]
 
@@ -20,6 +18,6 @@ ADD scripts $WORKDIR/scripts
 
 WORKDIR $WORKDIR/src
 
-CMD ["$WORKDIR/scripts/build.sh", "$OPENWRT_TARGET"]
+CMD ["../scripts/build.sh"]
 
 
diff --git a/README.md b/README.md
index 6bbde31..6d0d1ac 100644
--- a/README.md
+++ b/README.md
@@ -18,14 +18,14 @@ This image provides a toolchain to build OpenWRT for different hardware devices.
 
     docker run --rm caligari/openwrt-builder
 
+shows the help:
+
+    -ToDo-
+
 ### Docker volumes
 
     docker run -v $(pwd)/src:/usr/local/openwrt/src --rm caligari/openwrt-builder
 
-will show the help:
-
-    -ToDo-
-
 ### Compile an OpenWRT version to a hardware target
 
 ## Related info
@@ -34,7 +34,7 @@ will show the help:
 
 ## Thanks
 
-- [Javier Loureiro](https://twitter.com/StaticBoardsES) who had the idea for Raspberry Pi devices and provided config files for them.
+- [Javi Loureiro](https://twitter.com/StaticBoardsES) who had the idea for Raspberry Pi devices and provided config files for them.
 - [OpenWRT community](https://openwrt.org/) for its great product.
 
 
diff --git a/scripts/build.sh b/scripts/build.sh
index 2040b81..e533369 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -4,6 +4,9 @@
 
 # ToDo
 echo 'ToDo: examine targets from env vars...'
+echo "WORKDIR=$WORKDIR"
+echo "OPENWRT_RELEASE=$OPENWRT_RELEASE"
+echo "OPENWRT_TARGET=$OPENWRT_TARGET"
 exit 0
 
 # get the sources