diff --git a/README b/README
index 23fb03c..bb13e18 100644
--- a/README
+++ b/README
@@ -1,9 +1,31 @@
+Simplify Your Project Build Environment
 
-bootstrap-build-environment
+Automake and Autoconf based build environment that especially supports and preconfigures:
+ - C++ including:
+    - QT (without qmake, just using the AutoTools)
+    - LibTool
+    - Library dependencies
+    - CPP-Unit
+    - PKG-Config dependency file
+ - Doxygen for documentation
+ - Scripts
+ - HTML / Web projects
+ - Examples
+ - Tests
+ - Debian packaging
+ - RPM packaging
+ - Mac OSX App Bundle creation
+ - Subversion
+ - SQL to Doxygen schema documentation
+ - Build in Docker
+ - Resolve package dependencies
+ - ...
+
+Makefiles and other files are generated automatically, necessary build and dependency rules are automatically added. There are no redundancies. This reduces extremely the size of your configuration. The whole build system becomes extremely simple, lean and smart.
 
 Simply setup a new project:
  1. create a subversion basic tree
- 2. checkoutsubversion repository
+ 2. checkout subversion repository
  3. cd into the new project subversion working copy
  4. call with full path: /path/to/bootstrap.sh
  5. if trunk has been created, cd to trunk
@@ -14,28 +36,15 @@ Simply setup a new project:
 10. your project is setup and compilable, test: ./bootstrap.sh -b
  
 
-Fore more details, see:
-  ./bootstrap.sh -h
+For more details, see:
 
-Supports and preconfigures:
- - C++ including:
-    - Qt
-    - Library dependencies
-    - CPP-Unit
-    - PKG-Config dependency file
- - Doxygen for documentation
- - Scripts
- - HTML / Web projects
- - Examples
- - Tests
- - Debian packaging
- - RPM packaging
- - Mac OSX App Bundle creation
+    ./bootstrap.sh -h
 
 Example:
 
 There is a just created empty subversion repository:
-  https://dev.marc.waeckerlin.org/svn/project-name
+
+    https://dev.marc.waeckerlin.org/svn/project-name
 
 Setup a basic project:
 
@@ -46,7 +55,7 @@ Setup a basic project:
 
 The file AUTHORS is already correct due to my gnupg setup:
 
-    Fistname Lastname (https://my.homepage.xyz) <me@mysite.xyz>
+    Firstname Lastname (https://my.homepage.xyz) <me@mysite.xyz>
 
 Edit the file README, I add the following lines:
 
diff --git a/scripts/bootstrap.sh b/scripts/bootstrap.sh
index 67b7bf0..8c37435 100755
--- a/scripts/bootstrap.sh
+++ b/scripts/bootstrap.sh
@@ -20,7 +20,7 @@ DEFAULT_PROJECT_NAME=${PROJECT_PATH##*/}
 configure=0
 build=0
 docker=0
-buildtarget="distcheck"
+buildtarget=""
 overwrite=0
 rebuild=0
 rebuildfiles=()
@@ -28,8 +28,9 @@ while test $# -gt 0; do
     case "$1" in
         (--configure|-c) configure=1;;
         (--docker|-d) docker=1;;
-        (--build|-b) configure=1; build=1;;
-        (--target|-t) shift; configure=1; build=1; buildtarget="$1";;
+        (--build|-b) configure=1; build=1; buildtarget+=" distcheck";;
+        (--target|-t) shift; configure=1; build=1; buildtarget+=" $1";;
+        (--clean) shift; configure=1; build=1; buildtarget+=" maintainer-clean";;
         (--overwrite|-o) overwrite=1;;
         (--rebuild|-r) rebuild=1;;
         (--rebuild-file|-f) shift; rebuildfiles+=("$1");;
diff --git a/scripts/build-in-docker.sh b/scripts/build-in-docker.sh
index bb07c16..b6a1560 100755
--- a/scripts/build-in-docker.sh
+++ b/scripts/build-in-docker.sh
@@ -1,20 +1,140 @@
-#! /bin/bash -ex
+#! /bin/bash -e
 
 # build and test everything in a fresh docker installation
+img="ubuntu:latest"
+repos=()
+keys=()
+envs=()
+dirs=("-v $(pwd):/workdir")
+packages=()
+targets="all check distcheck"
+commands=()
+if test -e ./build-in-docker.conf; then
+    # you can preconfigure the variables in file build-in-docker.conf
+    # if you do so, add the file to EXTRA_DIST in makefile.am
+    source ./build-in-docker.conf
+fi
+while test $# -gt 0; do
+    case "$1" in
+        (-h|--help)
+            echo "$0 [OPTIONS]"
+            echo
+            echo "OPTIONS:"
+            echo
+            echo "  -h, --help            show this help"
+            echo "  -i, --image <image>   use given docker image instead of ${img}"
+            echo "  -t, --targets targets specify build targets, default: ${targets}"
+            echo "  -r, --repo <url>      add given apt repository"
+            echo "  -k, --key <url>       add public key from url"
+            echo "  -e, --env <var>=<val> set environment variable in docker"
+            echo "  -d, --dir <dir>       access given directory read only"
+            echo "  -p, --package <pkg>   install extra debian packages"
+            echo "  -c, --cmd <command>   execute commands as root in docker"
+            echo
+            echo "  The options -r -k -e -d -p -c can be repeated several times."
+            echo
+            echo "  The options -r -p -c allow an if-then-else contruct"
+            echo "  depending on the operating system:"
+            echo "    <os>:::<A>:::<B>"
+            echo "    <os>:::<A>"
+            echo "  Read as: On linux type <os> use <A> else use <B>"
+            echo "  That means: If the distributer ID or codename in lsb_release"
+            echo "  matches <os>, then <A> is replaced, else <B> is replaced."
+            echo "  The three colons are for splitting <os> from <A> and <B> part."
+            echo "  E.g.: Install package curl on wheezy and npm on olter systems:"
+            echo "    $0 -p wheezy:::curl:::npm"
+            echo
+            echo "EXAMPLE:"
+            echo
+            echo "$0 -i mwaeckerlin/ubuntu:trusty-i386 \\"
+            echo "                    -t deb \\"
+            echo "                    -e ANDROID_HOME=/opt/local/android \\"
+            echo "                    -d /opt/local/android \\"
+            echo "                    -r universe \\"
+            echo "                    -r https://dev.marc.waeckerlin.org/repository \\"
+            echo "                    -k https://dev.marc.waeckerlin.org/repository/PublicKey \\"
+            echo "                    -p mrw-c++"
+            echo
+            exit 0
+            ;;
+        (-i|--image) shift;
+            img="$1"
+            ;;
+        (-t|--targets) shift;
+            targets="$1"
+            ;;
+        (-r|--repo) shift;
+            repos+=("$1")
+            ;;
+        (-k|--key) shift;
+            keys+=("$1")
+            ;;
+        (-e|--env) shift;
+            envs+=("-e $1")
+            ;;
+        (-d|--dirs) shift;
+            dirs+=("-v $1:$1:ro")
+            ;;
+        (-p|--package) shift;
+            packages+=("$1")
+            ;;
+        (-c|--cmd) shift;
+            commands+=("$1")
+            ;;
+        (*)
+            echo "**** ERROR: unknown option '$1', try --help" 1>&2
+            exit 1
+            ;;
+    esac
+    if test $# -eq 0; then
+        echo "**** ERROR: missing value, try --help" 2>61
+        exit 1
+    fi
+    shift
+done
+
+function ifthenelse() {
+    arg="$1"
+    shift
+    cmd="$*"
+    if test "${arg/:::/}" = "${arg}"; then
+        docker exec ${DOCKER_ID} bash -c "${cmd//ARG/${arg}}"
+    else
+        os="${arg%%:::*}"
+        thenpart="${arg#*:::}"
+        if test "${thenpart/:::/}" = "${thenpart}"; then
+            docker exec ${DOCKER_ID} bash -c 'os="'$os'"; if test "${os//$(lsb_release -is)/}${os//$(lsb_release -cs)/}" != "${os}${os}"; then '"${cmd//ARG/${thenpart}}"'; fi'
+        else
+            elsepart="${thenpart##*:::}"
+            thenpart="${thenpart%:::*}"
+            docker exec ${DOCKER_ID} bash -c 'os="'$os'"; if test "${os//$(lsb_release -is)/}${os//$(lsb_release -cs)/}" != "${os}${os}"; then '"${cmd//ARG/${thenpart}}"'; else '"${cmd//ARG/${elsepart}}"'; fi'
+        fi
+    fi
+}
 
-DOCKER_ID=$(docker run -d -v $(pwd):/workdir -w /workdir ubuntu sleep infinity)
+set -x
+
+DOCKER_ID=$(docker run -d ${dirs[@]} ${envs[@]} -w /workdir $img sleep infinity)
 trap "docker rm -f ${DOCKER_ID}" INT TERM EXIT
-docker exec ${DOCKER_ID} apt-get install -y software-properties-common apt-transport-https dpkg-dev
-docker exec ${DOCKER_ID} apt-add-repository universe
-docker exec ${DOCKER_ID} apt-add-repository https://dev.marc.waeckerlin.org/repository
-wget -O- https://dev.marc.waeckerlin.org/repository/PublicKey \
-   | docker exec -i ${DOCKER_ID} apt-key add -
-if test -n "$*"; then
-    for p in $*; do
-        docker exec ${DOCKER_ID} apt-add-repository $p
-    done
+docker exec ${DOCKER_ID} apt-get update
+docker exec ${DOCKER_ID} apt-get upgrade -y --force-yes
+if ! docker exec ${DOCKER_ID} apt-get install -y --force-yes python-software-properties apt-transport-https dpkg-dev lsb-release; then
+    docker exec ${DOCKER_ID} apt-get install -y --force-yes software-properties-common apt-transport-https dpkg-dev lsb-release
 fi
+for repo in "${repos[@]}"; do
+    ifthenelse "${repo}" "apt-add-repository ARG"
+done
+for key in "${keys[@]}"; do
+    wget -O-  \
+        | docker exec -i ${DOCKER_ID} apt-key add -
+done
 docker exec ${DOCKER_ID} apt-get update
+for package in "${packages[@]}"; do
+    ifthenelse "${package}" "apt-get install -y --force-yes ARG"
+done
+for command in "${commands[@]}"; do
+    ifthenelse "${command}" "ARG"
+done
 docker exec ${DOCKER_ID} ./resolve-debbuilddeps.sh
 docker exec -u $(id -u) ${DOCKER_ID} svn upgrade || true
-docker exec -u $(id -u) ${DOCKER_ID} ./bootstrap.sh -t "all check distcheck"
+docker exec -u $(id -u) ${DOCKER_ID} ./bootstrap.sh -t "${targets}"
diff --git a/scripts/resolve-debbuilddeps.sh b/scripts/resolve-debbuilddeps.sh
index 5828d1c..6486a4e 100755
--- a/scripts/resolve-debbuilddeps.sh
+++ b/scripts/resolve-debbuilddeps.sh
@@ -16,7 +16,11 @@ if test -n "${SCHROOTNAME}"; then
   SUDO="schroot -c "${SCHROOTNAME}" -u root -d / --"
 else
   DO=""
-  SUDO="sudo"
+  if grep -q '/docker/' /proc/1/cgroup; then
+      SUDO=""
+  else
+      SUDO="sudo"
+  fi
 fi
 
 function install() {