diff --git a/check-install.sh b/check-install.sh
index 4902db5..6364a11 100755
--- a/check-install.sh
+++ b/check-install.sh
@@ -5,23 +5,23 @@ source "$DIR/lib/util.sh"
 
 function show_usage {
   echo
-  echo "Usage: $0 <deb_file> <image>"
+  echo "Usage: $0 deb_file [image]"
   echo
   echo "Paramètres: "
   echo
-  echo "  - <deb_file> Chemin vers le paquet Debian dont on doit vérifier l'installation"
-  echo "  - <image> Nom de l'image Docker à utiliser comme environnement pour tester l'installation"
+  echo "  - deb_file  Chemin vers le paquet Debian dont on doit vérifier l'installation"
+  echo "  - image     Optionnel - Nom de l'image Docker à utiliser comme environnement pour tester l'installation. Défaut: debian:jessie"
   echo
 }
 
 function create_container {
 
   # Escape image name
-  escaped_basename=$(echo "$BASE_IMAGE" | sed 's/[^a-z0-9\-\_\.]/\_/gi')
+  local escaped_basename=$(echo "$BASE_IMAGE" | sed 's/[^a-z0-9\-\_\.]/\_/gi')
   # Generate container tag
   container_tag="tamarin:${escaped_basename}_$(date +%s)"
   # Create temporary dir for the Dockerfile
-  temp_dir="$(mktemp -d)"
+  local temp_dir="$(mktemp -d)"
 
   # Link lib folder
   ln -s $(readlink -f "$DIR/lib") "$temp_dir/lib"
@@ -44,20 +44,17 @@ function create_container {
 EOF
 
   # Build image
-  tar -C "$temp_dir" -czh . | docker build -t "$container_tag" - 1>&2
+  tar -C "$temp_dir" -czh . | docker build -t "$container_tag" - 2> >(error) 1> >(info)
 
   # Delete temporary folder
   rm -rf "$temp_dir"
 
-  # Return newly created container's tag
-  echo $container_tag
-
 }
 
 function main {
 
   # Create container image
-  container_tag=$(create_container)
+  create_container
 
   # Run container and install package
   docker run -e "DISTRIB=$BASE_IMAGE" --rm -v="$DEB_DIR:/deb" "$container_tag" "/deb/$DEB_NAME"
@@ -72,7 +69,7 @@ function main {
 }
 
 # Test for arguments
-if [ -z "$1" ] || [ -z "$2" ]; then
+if [ -z "$1" ]; then
   show_usage
   exit 1
 fi
@@ -80,6 +77,6 @@ fi
 DEB_PATH=$(readlink -f "$1")
 DEB_NAME=$(basename "$DEB_PATH")
 DEB_DIR=$(dirname "$DEB_PATH")
-BASE_IMAGE="$2"
+BASE_IMAGE="${2:-debian:jessie}"
 
 main
diff --git a/get-updated-manifest-from-git.sh b/get-updated-manifest-from-git.sh
deleted file mode 100755
index f855d58..0000000
--- a/get-updated-manifest-from-git.sh
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env bash
-
-function show_usage {
-  echo
-  echo "Usage: $0 <src>"
-  echo
-  echo "Paramètres: "
-  echo
-  echo "  - <src> Chemin vers le répertoire des sources du projet. Le projet doit être un dépôt Git valide."
-  echo
-}
-
-function main {
-
-  cd "$SRC_DIR"
-
-  if [ ! -d '.git' ]; then
-    fatal "The directory $SRC_DIR seems not to be a valid Git repository."
-  fi
-
-  MANIFEST=$(cat tamarin.json 2>/dev/null)
-
-  if [ -z "$MANIFEST" ]; then
-    MANIFEST="{}"
-  fi
-
-  # Extract project info from Git
-  repo_name=$(basename `git rev-parse --show-toplevel`)
-  current_commit=$(git log -n 1 --pretty=format:"%h")
-  # Get commits log as changelog
-  logs=$(git log --pretty=format:"%an - %h : %s" | sed 's/"/\\"/g')
-  # Set the top commiter as the maintainer of the project
-  git_maintainer=$(git log --pretty=short | git shortlog -s -n -e | sed 's/^\s*[0-9]*\s*//g' | head -n 1)
-
-  # Get current version from manifest
-  current_name=$(echo "$MANIFEST" | jq -r ".name"  | sed 's/null//')
-  current_version=$(echo "$MANIFEST" | jq -r ".version"  | sed 's/null//')
-  current_changelog=$(echo "$MANIFEST" | jq -r ".changelog"  | sed 's/null//')
-  current_maintainer=$(echo "$MANIFEST" | jq -r ".maintainer"  | sed 's/null//')
-  timestamp=$(date +%Y%m%d%H%M)
-
-  # Complete manifest
-
-  # Add commit number to version
-  MANIFEST=$(echo "$MANIFEST" | jq -r ".version = \"${current_version:-0.0.0}+$timestamp~$current_commit\"")
-  # Set name if not defined
-  MANIFEST=$(echo "$MANIFEST" |  jq -r ".name = \"${current_name:-$repo_name}\"")
-  # Set maintainer if not defined
-  MANIFEST=$(echo "$MANIFEST" |  jq -r ".maintainer = \"${current_maintainer:-$git_maintainer}\"")
-
-  # Set changelog from git log if not defined
-  if [ -z "$current_changelog" ]; then
-
-    MANIFEST=$(echo "$MANIFEST" | jq -r ".changelog = []")
-
-    while read -r entry; do
-      MANIFEST=$(echo "$MANIFEST" | jq -r ".changelog += [\"$entry\"]")
-    done <<< "$logs"
-
-  fi
-
-  echo "$MANIFEST"
-
-}
-
-# Load util lib
-DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
-source "$DIR/lib/util.sh"
-
-# Test for arguments
-if [ -z "$1" ]; then
-  show_usage
-  exit 1
-fi
-
-SRC_DIR=$(readlink -f "$1")
-
-main
diff --git a/hooks/git/create-changelog-prebuild b/hooks/git/create-changelog-prebuild
index 3fd2633..dbd0bcc 100755
--- a/hooks/git/create-changelog-prebuild
+++ b/hooks/git/create-changelog-prebuild
@@ -7,11 +7,6 @@ if [ -f debian/changelog ] || [ ! -d .git ]; then
     exit
 fi
 
-if [ -z $(which git) ]; then
-    info "Installing Git..."
-    apt-get install --yes --no-install-recommends git-core
-fi
-
 # Get commits log as changelog
 
 logs=$(git log --pretty=format:"%an - %h : %s" | sed 's/"/\\"/g')
@@ -27,9 +22,9 @@ urgency=$(get_opt urgency low)
 
 commit_count=$(git rev-list --count --first-parent HEAD)
 current_commit=$(git log -n 1 --pretty=format:"%h")
-version_suffix=${commit_count}-${current_commit}
+version_suffix=${commit_count}~${current_commit}
 
-echo "${project_name} (${version}) ${distribution}; urgency=${urgency}" > debian/changelog
+echo "${project_name} (${version}.tamarin${version_suffix}) ${distribution}; urgency=${urgency}" > debian/changelog
 
 echo >> debian/changelog
 
diff --git a/hooks/git/install-git-containerbuild b/hooks/git/install-git-containerbuild
new file mode 100755
index 0000000..585549f
--- /dev/null
+++ b/hooks/git/install-git-containerbuild
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+echo "RUN apt-get install --yes --no-install-recommends git-core" >> Dockerfile
diff --git a/lib/build.sh b/lib/build.sh
index caf9491..4268f31 100755
--- a/lib/build.sh
+++ b/lib/build.sh
@@ -7,31 +7,6 @@ source "${TAMARIN_UTIL}"
 
 DIST_DIR="${BASE_DIR}/dist"
 SRC_DIR="${BASE_DIR}/src"
-HOOKS_DIR="${BASE_DIR}/hooks"
-
-function exec_hooks {
-
-  hook=${1}
-  workspace=${2}
-
-  hook_scripts=$( find "${HOOKS_DIR}" -type f -name "*${hook}" -executable)
-
-  for hook_script in ${hook_scripts}; do
-
-    info "[hook-${hook}] Executing ${hook_script}"
-
-    ( cd "${workspace}" && "${hook_script}" )
-
-    # If the script did not execute properly, we stop here
-    if [ $? != 0 ]; then
-      fatal "The '${hook_script}' hook script did not finished properly !"
-    fi
-
-    info "[hook-${hook}] ${hook_script} done."
-
-  done
-
-}
 
 function build_project {
 
@@ -39,7 +14,8 @@ function build_project {
 
   set_opt project_name "${PROJECT_NAME}"
 
-  workspace=$(mktemp -d)
+  local workspace=$(mktemp -d)/${PROJECT_NAME}
+  mkdir -p "${workspace}"
 
   # Copy sources to workspace
   cd ${SRC_DIR}
@@ -48,7 +24,7 @@ function build_project {
   exec_hooks "prebuild" "${workspace}"
 
   cd "${workspace}"
-  dpkg-buildpackage -us -uc
+  dpkg-buildpackage -us -uc 2> >(error) 1> >(info)
 
   if [ $? != 0 ]; then
     fatal "The build process has not completed successfuly !"
diff --git a/lib/install.sh b/lib/install.sh
index 775793c..68ea518 100644
--- a/lib/install.sh
+++ b/lib/install.sh
@@ -6,7 +6,7 @@ DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 source "${DIR}/util.sh"
 
 info "Updating packages definition..."
-apt-get update
+apt-get update 2> >(error) 1> >(info)
 
 info "Installing package $1..."
-gdebi --n "$1"
+gdebi --n "$1" 2> >(error) 1> >(info)
diff --git a/lib/util.sh b/lib/util.sh
index 3596a92..cb404e2 100644
--- a/lib/util.sh
+++ b/lib/util.sh
@@ -1,36 +1,90 @@
 #!/usr/bin/env bash
 
-OPT_FILE="/tmp/.tamarin_opts"
+HOOKS_DIR="${BASE_DIR}/hooks"
+OPT_FILE="${BASE_DIR}/tmp/.tamarin_opts"
 
 function info {
-  echo "[${HOSTNAME}] [INFO] $@"
+  if [ -z "$@" ]; then
+    while read str; do
+      log INFO "${str}"
+    done
+  else
+    log INFO "$@"
+  fi
 }
 
 function debug {
-  echo "[${HOSTNAME}] [DEBUG] $@"
+  if [ -z "$@" ]; then
+    while read str; do
+      log DEBUG "${str}"
+    done
+  else
+    log DEBUG "$@"
+  fi
 }
 
 function error {
-  echo "[${HOSTNAME}] [ERROR] $@" >&2
+  if [ -z "$@" ]; then
+    while read str; do
+      log ERROR "${str}" >&2
+    done
+  else
+    log ERROR "$@" >&2
+  fi
 }
 
 function fatal {
-  echo "[${HOSTNAME}] [FATAL] $@" >&2
+  if [ -z "$@" ]; then
+    while read str; do
+      log FATAL "${str}" >&2
+    done
+  else
+    log FATAL "$@" >&2
+  fi
   exit 1
 }
 
+function log {
+  local args=( $@ )
+  echo "[${HOSTNAME}] [${args[0]}] ${args[@]:1}"
+}
+
 function get_opt {
-    opt_name=${1}
-    default_value=${2}
-    touch "${OPT_FILE}"
-    source "${OPT_FILE}"
-    echo ${!opt_name:-${default_value}}
+  local opt_name=${1}
+  local default_value=${2}
+  touch "${OPT_FILE}"
+  source "${OPT_FILE}"
+  echo ${!opt_name:-${default_value}}
 }
 
 function set_opt {
-    opt_name=${1}
-    opt_value=${2}
-    touch "${OPT_FILE}"
-    sed -i "s/^${opt_name}*$//" "${OPT_FILE}"
-    echo "${opt_name}=\"${opt_value}\"" >> "${OPT_FILE}"
+  local opt_name=${1}
+  local opt_value=${2}
+  touch "${OPT_FILE}"
+  sed -i "s/^${opt_name}*$//" "${OPT_FILE}"
+  echo "${opt_name}=\"${opt_value}\"" >> "${OPT_FILE}"
+}
+
+function exec_hooks {
+
+  local hook=${1}
+  local workspace=${2}
+
+  local hook_scripts=$( find "${HOOKS_DIR}" -type f -name "*${hook}" -executable)
+
+  for hook_script in ${hook_scripts}; do
+
+    info "[${hook}] Executing ${hook_script}"
+
+    ( cd "${workspace}" && "${hook_script}" ) 2> >(error) 1> >(info)
+
+    # If the script did not execute properly, we stop here
+    if [ $? != 0 ]; then
+      fatal "The '${hook_script}' hook script did not finished properly !"
+    fi
+
+    info "[${hook}] ${hook_script} Done."
+
+  done
+
 }
diff --git a/package.sh b/package.sh
index 679b9ef..252722e 100755
--- a/package.sh
+++ b/package.sh
@@ -3,7 +3,9 @@
 set -e
 
 TAMARIN_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
-source "$TAMARIN_DIR/lib/util.sh"
+
+
+BASE_DIR="$TAMARIN_DIR" source "$TAMARIN_DIR/lib/util.sh"
 
 function show_usage {
   echo
@@ -21,11 +23,11 @@ function show_usage {
 function create_container {
 
   # Escape image name
-  escaped_basename=$(echo "$BASE_IMAGE" | sed 's/[^a-z0-9\-\_\.]/\_/gi')
+  local escaped_basename=$(echo "$BASE_IMAGE" | sed 's/[^a-z0-9\-\_\.]/\_/gi')
   # Generate container tag
   container_tag="tamarin:${escaped_basename}_$(date +%s)"
   # Create temporary dir for the Dockerfile
-  temp_dir="$(mktemp -d)"
+  local temp_dir="$(mktemp -d)"
 
   # Link lib & hooks folders
   ln -s $(readlink -f "$TAMARIN_DIR/lib") "$temp_dir/lib"
@@ -51,30 +53,34 @@ function create_container {
     VOLUME /dist
 
     CMD /root/.tamarin/lib/build.sh
+
 EOF
 
+  exec_hooks "containerbuild" "$temp_dir"
+
   # Build image
-  tar -C "$temp_dir" -czh . | docker build -t "$container_tag" - 1>&2
+  tar -C "$temp_dir" -czh . | docker build -t "$container_tag" - 2> >(error) 1> >(info)
 
   # Delete temporary folder
   rm -rf "$temp_dir"
 
-  # Return newly created container's tag
-  echo $container_tag
-
 }
 
 # Main function
 function main {
 
   info "Building container from $BASE_IMAGE..."
-  container_tag="$(create_container)"
-  project_name="$(basename "${PROJECT_PATH}")"
 
-  info "Launching container..."
+  # Create container & "$container_tag" variable
+  create_container
+
+  local project_name="$(basename "${PROJECT_PATH}")"
+
+  info "Switching to container..."
   docker run -e "DISTRIB=$BASE_IMAGE" -e "PROJECT_NAME=$project_name" --rm -v="$PROJECT_PATH:/src" -v="$PROJECT_DIST:/dist" "$container_tag"
 
   info "Done"
+
 }
 
 # Test for arguments