diff --git a/Makefile b/Makefile
index 144544e..02e76cb 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ build:
 	scripts/shcompile src/main.sh > zpkg && chmod +x zpkg
 
 # minimized build with lxsh
-var_exclude = TMPDIR ZPKG_.* _ZPKG_.* SSH_ADDRESS HTTP_ADDRESS PKG_PATH COMPRESSION ALLOW_ROOT UPDATE_REMOVE NOSUDO
+var_exclude = TMPDIR ZPKG_.* _ZPKG_.* SSH_ADDRESS HTTP_ADDRESS PKG_PATH COMPRESSION ALLOW_ROOT UPDATE_REMOVE NOSUDO ROOT_PATH DEBUG
 minimal: minimal-deploy
 
 minimal-deploy: minimal-build
diff --git a/src/config.sh b/src/config.sh
index bbf442e..43bbb23 100644
--- a/src/config.sh
+++ b/src/config.sh
@@ -10,6 +10,14 @@ virtual_config_path()
   ln -sf "$old_pkg_path/installed" "$PKG_PATH/installed"
 }
 
+# defaults
+config_path=${ZPKG_ROOT_PATH-$ROOT_PATH}/etc/zpkg
+fname="$(basename "$0")"
+ALLOW_ROOT=false
+UPDATE_REMOVE=true
+TMPDIR=${TMPDIR-/tmp}
+
+
 # resolve relative config_path
 config_path="$(resolve_path "$config_path" "$(pwd)")"
 config_file="$config_path/zpkg.conf"
diff --git a/src/deploy.sh b/src/deploy.sh
index 79aa0e1..914e39a 100644
--- a/src/deploy.sh
+++ b/src/deploy.sh
@@ -1,6 +1,5 @@
 #!/bin/sh
 
-
 # $1 = source , $2 = package , $3 = name
 package()
 {
diff --git a/src/env.sh b/src/env.sh
deleted file mode 100644
index 4086aff..0000000
--- a/src/env.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-
-_OUTPUT=/dev/stdin
-[ "$_ZPKG_SELF_UPGRADE" = "y" ] && _OUTPUT=/dev/null
-
-config_path=$ZPKG_ROOT_PATH/etc/zpkg
-fname="$(basename "$0")"
-ALLOW_ROOT=false
-UPDATE_REMOVE=true
-
-[ -z "$TMPDIR" ] && TMPDIR=/tmp
diff --git a/src/files.sh b/src/files.sh
new file mode 100644
index 0000000..46213b6
--- /dev/null
+++ b/src/files.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+# $1 = file , $2 = prefix , $3 = target to extract
+unpack()
+{
+  echo "Unpacking $1"
+  $pcompress -dc < "$1" 2>/dev/null | tar -xf - $3
+}
+
+# $1 = source_dir , $2 = dest_dir , $3 = prefix
+copy_files() {
+  $3 cp -r "$1/." "$2"
+}
+
+
+install_files() {
+  (
+    umask a+rx
+    set -e
+    if [ -d "ROOT" ] ; then
+      copy_files ROOT "$ROOT_PATH/" $2 2>/dev/null
+    fi
+    if [ -d "HOME" ] ; then
+      copy_files HOME "$HOME" 2>/dev/null
+    fi
+    add_package_entry "$1" $2
+  )
+}
+
+# files from stdin
+# $1 = from where , $2 = prefix
+delete_files()
+{
+  cd "$1" || return $?
+  list=$(cat)
+  printf "%s\n" "$list" | tr '\n' '\0' | $2 xargs -0 rm -d 2>/dev/null
+  printf "%s\n" "$list" | tr '\n' '\0' | xargs -0 -n1 dirname | uniq |
+    tr '\n' '\0' | $2 xargs -0 rmdir -p 2>/dev/null
+}
+
+# stdin: old list
+# $1 = old list , $2 = new path
+to_delete()
+{
+  find "$2" -type d 2>/dev/null | sed 's|$|/|g' > tmplist
+  find "$2" -type f 2>/dev/null >> tmplist
+  sort tmplist > list
+  diff --new-line-format="" --unchanged-line-format="" "$1" list
+  rm tmplist list
+}
+
+# $1 = package , $2 = sudo
+remove_files() {
+  filetree=$(metadata_get tree < "$PKG_PATH/$1.dat" | base64 -d)
+  printf "%s\n" "$filetree" | grep "^ROOT/" | to_delete - ROOT | sed 's|^ROOT/||g' | tac | delete_files "$ROOT_PATH/" $2
+  printf "%s\n" "$filetree" | grep "^HOME/" | to_delete - HOME | sed 's|^HOME/||g' | tac | delete_files "$HOME"
+}
diff --git a/src/install.sh b/src/install.sh
deleted file mode 100644
index 3abe1ce..0000000
--- a/src/install.sh
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/bin/sh
-
-# $1 = file , $2 = prefix , $3 = target to extract
-unpack()
-{
-  echo "Unpacking $1"
-  $pcompress -dc < "$1" 2>/dev/null | tar -xf - $3
-}
-
-# $1 = package , $2 = prefix
-add_package_entry()
-{
-  (
-    set -e
-    cd "$PKG_PATH"
-    if grep -q "^$1 " installed 2>/dev/null
-    then
-      $2 sed "s|$1 .*\$|$1 $(date +%s)|g" -i installed
-    else
-      $2 sh -c "echo '$1 $(date +%s)' >> installed"
-      $2 chmod a+r installed
-    fi
-  )
-}
-
-# $1 = source_dir , $2 = dest_dir , $3 = prefix
-copy_files() {
-  $3 cp -r "$1/." "$2"
-}
-
-# $1 = package , $2 = prefix
-install_package()
-{
-  [ "$1" = "$fname" ] && [ -z "$opt_R" ] && _self_update=y && return 0
-  echo "Installing $1"
-  tmpdir="$TMPDIR/zpkg_$(random_string 5)"
-  mkdir -p "$tmpdir"
-  (
-    cd "$tmpdir" || exit $?
-    fetch_package "$1" || { echo "Package '$1' not found" >&2 && return 1; }
-    unpack "$1.tar.$extension" $2 || exit $?
-    gen_metadata "$1.tar.$extension" | $2 tee "$PKG_PATH/$1.dat" >/dev/null
-    hook install pre "$1" $2
-    install_files "$1" $2
-    hook install post "$1" $2
-    add_package_entry "$1" $2
-  )
-  ret=$?
-  rm -rf "$tmpdir" 2>/dev/null
-  return $ret
-}
diff --git a/src/view.sh b/src/list.sh
similarity index 84%
rename from src/view.sh
rename to src/list.sh
index c895d2a..75115b9 100644
--- a/src/view.sh
+++ b/src/list.sh
@@ -1,19 +1,5 @@
 #!/bin/sh
 
-deps()
-{
-  (
-  cd "$PKG_PATH"
-  l=$(grep "^$1 " pkglist) || return $?
-  echo "$l" | cut -d' ' -f3-
-  )
-}
-
-# $1 = pkg file
-desc() {
-  cat "$1" | $pcompress -dc 2>/dev/null | tar -xOf - DESC
-}
-
 resolve_packages()
 {
   RET=0
@@ -47,14 +33,6 @@ resolve_deps()
   return $RET
 }
 
-is_installed()
-{
-  (
-  cd "$PKG_PATH"
-  grep -q "^$1 " installed 2>/dev/null
-  )
-}
-
 # $1 = file
 view_package_file() {
   tree=$(cat "$1" | $pcompress -dc 2>/dev/null | tar -tf - 2>/dev/null) || exit $?
diff --git a/src/main.sh b/src/main.sh
index 7f3d009..674459c 100644
--- a/src/main.sh
+++ b/src/main.sh
@@ -3,9 +3,7 @@
 [ "$DEBUG" = true ] && set -x
 
 # ordered requirements
-%include util.sh env.sh print.sh
-%include options.sh
-%include config.sh
+%include util.sh options.sh config.sh
 
 # everything else
 %include *.sh
diff --git a/src/metadata.sh b/src/metadata.sh
index 50a22ec..4751b3a 100644
--- a/src/metadata.sh
+++ b/src/metadata.sh
@@ -1,3 +1,38 @@
+#!/bin/sh
+
+# $1 = package , $2 = prefix
+add_package_entry()
+{
+  (
+    set -e
+    cd "$PKG_PATH"
+    if grep -q "^$1 " installed 2>/dev/null ; then
+      $2 sed "s|$1 .*\$|$1 $(date +%s)|g" -i installed
+    else
+      $2 sh -c "echo '$1 $(date +%s)' >> installed"
+      $2 chmod a+r installed
+    fi
+  )
+}
+
+deps()
+{
+  (
+  cd "$PKG_PATH"
+  l=$(grep "^$1 " pkglist) || return $?
+  echo "$l" | cut -d' ' -f3-
+  )
+}
+
+# $1 = package
+is_installed()
+{
+  (
+  cd "$PKG_PATH"
+  grep -q "^$1 " installed 2>/dev/null
+  )
+}
+
 # stdin = metadata
 # $1 = value
 metadata_get() {
@@ -29,12 +64,12 @@ gen_metadata() {
   printf "installsize=%s\n" "$isize"
   gen_hook_metadata
   printf "tree=%s\n" "$(find ROOT HOME ! -type d 2>/dev/null | base64 -w0)"
-  printf "dirtree=%s\n" "$(find ROOT HOME -type d -mindepth 1 2>/dev/null | base64 -w0)"
+  printf "dirtree=%s\n" "$(find ROOT HOME -mindepth 1 -type d 2>/dev/null | base64 -w0)"
 }
 
 # $1 = sudo
 convert_to_metadata() {
-  find "$PKG_PATH" -type f -maxdepth 1 -name "*.tar.$extension" |
+  find "$PKG_PATH" -maxdepth 1 -type f -name "*.tar.$extension" |
   while read -r I ; do
     pkgname=$(basename "${I%.tar.$extension}")
     echo "Migrate $pkgname"
diff --git a/src/operation.sh b/src/operation.sh
new file mode 100644
index 0000000..6d52ff4
--- /dev/null
+++ b/src/operation.sh
@@ -0,0 +1,80 @@
+#!/bin/sh
+
+# $1 = package , $2 = prefix
+install_package()
+{
+  [ "$1" = "$fname" ] && [ -z "$opt_R" ] && _self_update=y && return 0
+  echo "Installing $1"
+  tmpdir="$TMPDIR/zpkg_$(random_string 5)"
+  mkdir -p "$tmpdir"
+  (
+    cd "$tmpdir" || exit $?
+    fetch_package "$1" || { echo "Package '$1' not found" >&2 && return 1; }
+    unpack "$1.tar.$extension" $2 || exit $?
+    gen_metadata "$1.tar.$extension" | $2 tee "$PKG_PATH/$1.dat" >/dev/null
+    hook install pre "$1" $2
+    install_files "$1" $2
+    hook install post "$1" $2
+    add_package_entry "$1" $2
+  )
+  ret=$?
+  rm -rf "$tmpdir" 2>/dev/null
+  return $ret
+}
+
+# $1 = package , $2 = prefix
+remove_package()
+{
+  if [ ! -f "$PKG_PATH/$1.dat" ] || ! grep -q "^$1 " "$PKG_PATH/installed"
+  then
+    echo "Package '$1' not installed" >&2
+    return 1
+  fi
+
+  echo "Removing $1"
+
+  hook remove pre "$1" $2
+  remove_files "$1" $2
+  hook remove post "$1" $2
+  $2 rm -f "$PKG_PATH/$1.dat" 2>/dev/null
+  $2 sed -i "/^$1 /d" "$PKG_PATH/installed"
+
+}
+
+# $1 = package , $2 = prefix
+upgrade_package()
+{
+  [ "$1" = "$fname" ] && [ -z "$opt_R" ] && _self_update=y && return 0
+  echo "Updating $1"
+  tmpdir="$TMPDIR/zpkg_$(random_string 5)"
+  mkdir -p "$tmpdir"
+  (
+    # fetch package
+    cd "$tmpdir"
+    fetch_package "$1" || { echo "Package '$1' not found" >&2 && return 1; }
+    unpack "$1.tar.$extension" || return $?
+
+    hook upgrade pre "$1" $2
+    remove_files "$1" $2
+    gen_metadata . | $2 tee "$PKG_PATH/$1.dat" >/dev/null
+    install_files "$1" $2
+    hook upgrade post "$1" $2
+  )
+  ret=$?
+  rm -rf "$tmpdir" 2>/dev/null
+  return $ret
+}
+
+## self upgrading mitigation
+
+_OUTPUT=/dev/stdin
+[ "$_ZPKG_SELF_UPGRADE" = "y" ] && _OUTPUT=/dev/null
+
+unset _self_update
+do_self_update()
+{
+  _tmpzpkg="$TMPDIR/zpkg_bin_$(random_string 5)"
+  # copy current file
+  cp "$0" "$_tmpzpkg" || return $?
+  exec sh -c '_ZPKG_SELF_UPGRADE=y "$1" -c "$2" -R install zpkg ; rm -f "$1"' sh "$_tmpzpkg" "$config_path"
+}
diff --git a/src/process.sh b/src/process.sh
deleted file mode 100644
index 4e4f791..0000000
--- a/src/process.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-install_files() {
-  (
-    umask a+rx
-    set -e
-    if [ -d "ROOT" ] ; then
-      copy_files ROOT "$ROOT_PATH/" $2 2>/dev/null
-    fi
-    if [ -d "HOME" ] ; then
-      copy_files HOME "$HOME" 2>/dev/null
-    fi
-    add_package_entry "$1" $2
-  )
-}
-
-# $1 = package , $2 = sudo
-remove_files() {
-  filetree=$(metadata_get tree < "$PKG_PATH/$1.dat" | base64 -d)
-  printf "%s\n" "$filetree" | grep "^ROOT/" | to_delete - ROOT | sed 's|^ROOT/||g' | tac | delete_files "$ROOT_PATH/" $2
-  printf "%s\n" "$filetree" | grep "^HOME/" | to_delete - HOME | sed 's|^HOME/||g' | tac | delete_files "$HOME"
-}
diff --git a/src/remove.sh b/src/remove.sh
deleted file mode 100644
index 9935c2d..0000000
--- a/src/remove.sh
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/bin/sh
-
-# files from stdin
-# $1 = from where , $2 = prefix
-delete_files()
-{
-  cd "$1" || return $?
-  list=$(cat)
-  printf "%s\n" "$list" | tr '\n' '\0' | $2 xargs -0 rm -d 2>/dev/null
-  printf "%s\n" "$list" | tr '\n' '\0' | xargs -0 -n1 dirname | uniq |
-    tr '\n' '\0' | $2 xargs -0 rmdir -p 2>/dev/null
-}
-
-# stdin: old list
-# $1 = old list , $2 = new path
-to_delete()
-{
-  find "$2" -type d 2>/dev/null | sed 's|$|/|g' > tmplist
-  find "$2" -type f 2>/dev/null >> tmplist
-  sort tmplist > list
-  diff --new-line-format="" --unchanged-line-format="" "$1" list
-  rm tmplist list
-}
-
-# $1 = package , $2 = prefix
-remove_package()
-{
-  if [ ! -f "$PKG_PATH/$1.dat" ] || ! grep -q "^$1 " "$PKG_PATH/installed"
-  then
-    echo "Package '$1' not installed" >&2
-    return 1
-  fi
-
-  echo "Removing $1"
-
-  hook remove pre "$1" $2
-  remove_files "$1" $2
-  hook remove post "$1" $2
-  $2 rm -f "$PKG_PATH/$1.dat" 2>/dev/null
-  $2 sed -i "/^$1 /d" "$PKG_PATH/installed"
-
-}
diff --git a/src/upgrade.sh b/src/upgrade.sh
deleted file mode 100644
index 315b21c..0000000
--- a/src/upgrade.sh
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/bin/sh
-
-# $1 = package , $2 = prefix
-upgrade_package()
-{
-  [ "$1" = "$fname" ] && [ -z "$opt_R" ] && _self_update=y && return 0
-  echo "Updating $1"
-  tmpdir="$TMPDIR/zpkg_$(random_string 5)"
-  mkdir -p "$tmpdir"
-  (
-    # fetch package
-    cd "$tmpdir"
-    fetch_package "$1" || { echo "Package '$1' not found" >&2 && return 1; }
-    unpack "$1.tar.$extension" || return $?
-
-    hook upgrade pre "$1" $2
-    remove_files "$1" $2
-    gen_metadata . | $2 tee "$PKG_PATH/$1.dat" >/dev/null
-    install_files "$1" $2
-    hook upgrade post "$1" $2
-  )
-  ret=$?
-  rm -rf "$tmpdir" 2>/dev/null
-  return $ret
-}
-
-## self upgrading mitigation
-
-unset _self_update
-do_self_update()
-{
-  _tmpzpkg="$TMPDIR/zpkg_bin_$(random_string 5)"
-  # copy current file
-  cp "$0" "$_tmpzpkg" || return $?
-  exec sh -c '_ZPKG_SELF_UPGRADE=y "$1" -c "$2" -R install zpkg ; rm -f "$1"' sh "$_tmpzpkg" "$config_path"
-}