diff --git a/README.md b/README.md
index b4c4255..0d6f079 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ Follow steps listed below:
 
     ```
 # export PATH=/opt/m68k-amigaos/bin:$PATH
-# ./install-sdk.sh --prefix=/opt/m68k-amigaos ahi cgx mui
+# ./toolchain-m68k --prefix=/opt/m68k-amigaos install-sdk ahi cgx mui
 ```
 
 **Note:** *If the build process fails, please write me an e-mail.  I'll try to help out. Don't forget to put into e-mail as much data about your environment as possible!*
diff --git a/install-sdk.sh b/install-sdk.sh
deleted file mode 100755
index f0c96f2..0000000
--- a/install-sdk.sh
+++ /dev/null
@@ -1,242 +0,0 @@
-#!/bin/bash
-
-readonly TOP_DIR="$(pwd)"
-
-function download {
-  local -r url="$1"
-  local -r file="${2:-$(basename "${url}")}"
-
-  if [ ! -f "${file}" ]; then
-    wget -O "${file}" "${url}" || exit 1
-  fi
-}
-
-function list {
-  echo "Available SDKs:"
-
-  for sdk in ${TOP_DIR}/sdk/*.sdk; do
-    name=$(basename ${sdk})
-    short=`sed -ne "s/Short: //p" ${sdk}`
-    ver=`sed -ne "s/Version: //p" ${sdk}`
-    echo " - ${name%%.sdk} : $short $ver"
-  done
-}
-
-function add_stubs {
-  local src="$1"
-  local libdir="$2"
-  local obj="${src%.c}.o"
-
-  echo "${obj} -> ${PREFIX}/lib/${libdir}/libstubs.a"
-  m68k-amigaos-gcc "${CFLAGS}" -noixemul -c -o "${obj}" "${src}" && \
-    m68k-amigaos-ar rs "${PREFIX}/lib/${libdir}/libstubs.a" "${obj}"
-  rm -f "${obj}"
-}
-
-function add_lib {
-  local src="$1"
-  local lib="$2"
-  local obj="${src%.a}.o"
-
-  echo "${src} -> ${PREFIX}/lib/${lib}"
-  m68k-amigaos-gcc "${CFLAGS}" -noixemul -c -o "${obj}" "${src}" && \
-    m68k-amigaos-ar rcs "${PREFIX}/lib/${lib}" "${obj}"
-  rm -f "${obj}"
-}
-
-function install_sdk {
-  local name="$1"
-  local sdk="$2"
-
-  local url=`sed -ne "s/Url: //p" ${sdk}`
-  local tmp=`mktemp -d -t "${name}"`
-
-  pushd ${tmp}
-
-  download "${url}"
-
-  lha -xgq `basename ${url}`
-
-  sed -ne '5,$p' ${sdk} | while read -a line; do
-    if [[ ${#line[@]} > 1 ]]; then
-      case ${line[1]} in
-        "=")
-          file=${line[2]}
-          path=${line[0]}
-          new_path=$(dirname ${path})/${file}
-          mv -v ${path} ${new_path}
-          path=${new_path}
-          ;;
-        ":")
-          case ${line[0]} in
-            "fd2sfd")
-              sfd="$(basename ${line[2]%%.fd}.sfd)"
-              echo "${line[2]} ${line[3]} -> ${sfd}"
-              fd2sfd -o ${sfd} ${line[2]} ${line[3]}
-              mkdir -p "${PREFIX}/os-lib/sfd"
-              cp -v ${sfd} "${PREFIX}/os-lib/sfd/${sfd}"
-              ;;
-            "sfdc")
-              path=${line[2]}
-              file=$(basename ${path})
-              base=${file%_lib.sfd}
-
-              mkdir -p "${PREFIX}/os-include/proto"
-              mkdir -p "${PREFIX}/os-include/inline"
-              mkdir -p "${PREFIX}/os-include/lvo"
-
-              echo "${path} -> ${PREFIX}/os-include/proto/${base}.h"
-              sfdc --quiet --target=m68k-amigaos --mode=proto \
-                --output="${PREFIX}/os-include/proto/${base}.h" ${path}
-
-              echo "${path} -> ${PREFIX}/os-include/inline/${base}.h"
-              sfdc --quiet --target=m68k-amigaos --mode=macros \
-                --output="${PREFIX}/os-include/inline/${base}.h" ${path}
-
-              echo "${path} -> ${PREFIX}/os-include/lvo/${base}.i"
-              sfdc --quiet --target=m68k-amigaos --mode=lvo \
-                --output="${PREFIX}/os-include/lvo/${base}.i" ${path}
-              ;;
-            "stubs")
-              path=${line[2]}
-              filepart=$(basename ${path})
-              file="${filepart%_lib.sfd}.c"
-
-              echo "${path} -> ${file}"
-              sfdc --quiet --target=m68k-amigaos --mode=autoopen \
-                --output="${file}" ${path}
-
-              CFLAGS="-Wall -O3 -fomit-frame-pointer"
-              add_stubs "${file}" "libnix"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel -DSMALL_DATA"
-              add_stubs "${file}" "libb/libnix"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -m68020"
-              add_stubs "${file}" "libm020/libnix"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel -DSMALL_DATA -m68020"
-              add_stubs "${file}" "libb/libm020/libnix"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -m68020 -m68881"
-              add_stubs "${file}" "libm020/libm881/libnix"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel -DSMALL_DATA -m68020 -m68881"
-              add_stubs "${file}" "libb/libm020/libm881/libnix"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel32 -DSMALL_DATA -m68020"
-              add_stubs "${file}" "libb32/libm020/libnix"
-              ;;
-            "lib")
-              path=${line[2]}
-              filepart=$(basename ${path})
-              file="${filepart%_lib.sfd}.c"
-              lib="lib${name}.a"
-
-              echo "${path} -> ${file}"
-              sfdc --quiet --target=m68k-amigaos --mode=stubs \
-                --output="${file}" ${path}
-
-              CFLAGS="-Wall -O3 -fomit-frame-pointer"
-              add_lib "${file}" "${lib}"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel -DSMALL_DATA"
-              add_lib "${file}" "libb/${lib}"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -m68020"
-              add_lib "${file}" "libm020/${lib}"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel -DSMALL_DATA -m68020"
-              add_lib "${file}" "libb/libm020/${lib}"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -m68020 -m68881"
-              add_lib "${file}" "libm020/libm881/${lib}"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel -DSMALL_DATA -m68020 -m68881"
-              add_lib "${file}" "libb/libm020/libm881/${lib}"
-              CFLAGS="-Wall -O3 -fomit-frame-pointer -fbaserel32 -DSMALL_DATA -m68020"
-              add_lib "${file}" "libb32/libm020/${lib}"
-              ;;
-            *)
-              echo "Unknown preprocessor: '${line}'"
-              exit 1
-              ;;
-          esac
-          continue
-          ;;
-        *)
-          echo "Syntax error: '${line}'"
-          exit 1
-          ;;
-      esac
-    else
-      file=$(basename ${line})
-      path=${line}
-    fi
-
-    lastdir=$(basename $(dirname ${path}))
-
-    case ${file} in
-      *.doc|*.html|*.pdf|*.ps) 
-        mkdir -p "${PREFIX}/doc"
-        cp -v ${path} ${PREFIX}/doc/${file}
-        ;;
-      *.guide)
-        mkdir -p "${PREFIX}/guide"
-        cp -v ${path} ${PREFIX}/guide/${file}
-        ;;
-      *.i|*.h)
-        mkdir -p "${PREFIX}/os-include/${lastdir}"
-        cp -v ${path} ${PREFIX}/os-include/${lastdir}/${file}
-        ;;
-      *.fd)
-        mkdir -p "${PREFIX}/os-lib/fd"
-        cp -v ${path} ${PREFIX}/os-lib/fd/${file}
-        ;;
-      *.sfd)
-        mkdir -p "${PREFIX}/os-lib/sfd"
-        cp -v ${path} ${PREFIX}/os-lib/sfd/${file}
-        ;;
-      *)
-        echo "${path} ???"
-        exit 1
-        ;;
-    esac
-  done
-
-  popd
-
-  rm -rf "${tmp}"
-}
-
-function main {
-  PREFIX="${TOP_DIR}/target"
-
-  local action
-
-  while [ -n "${1:-}" ]; do
-    case "$1" in
-      --prefix=*)
-        PREFIX=${1#*=}
-        ;;
-      --*)
-        echo "Unknown option: $1"
-        exit 1
-        ;;
-      *)
-        break
-        ;;
-    esac
-    shift
-  done
-
-  if [[ "$@" == "" ]]; then
-    echo "Usage: $0 sdk1 sdk2 ..."
-    echo ""
-    list
-    exit 1
-  fi
-
-  for name in $@; do
-    sdk="${TOP_DIR}/sdk/${name}.sdk"
-
-    if [ ! -f "${sdk}" ]; then
-      echo "Unknown SDK - '${name}' !"
-      exit 1
-    fi
-
-    echo "Installing '${name}'..."
-    install_sdk "${name}" "${sdk}"
-  done
-}
-
-main "$@"
diff --git a/toolchain-m68k b/toolchain-m68k
index 99253fd..407480f 100755
--- a/toolchain-m68k
+++ b/toolchain-m68k
@@ -8,6 +8,8 @@ from os import environ
 import argparse
 import logging
 import platform
+import re
+import string
 import sys
 
 URLS = \
@@ -39,6 +41,16 @@ URLS = \
     'vclib.lha')]
 
 
+MULTILIB = [('', []),
+            ('libb', ['-fbaserel', '-DSMALL_DATA']),
+            ('libm020', ['-m68020']),
+            ('libb/libm020', ['-fbaserel', '-DSMALL_DATA', '-m68020']),
+            ('libm020/libm881', ['-m68020', '-m68881']),
+            ('libb/libm020/libm881',
+             ['-fbaserel', '-DSMALL_DATA', '-m68020', '-m68881']),
+            ('libb32/libm020', ['-fbaserel32', '-DSMALL_DATA', '-m68020'])]
+
+
 from common import * # NOQA
 
 
@@ -314,8 +326,10 @@ def build():
               '--target=m68k-amigaos',
               '--enable-languages=c,c++',
               '--with-headers={sources}/{ixemul}/include')
-  make('{gcc}', 'all-gcc', MAKEINFO='makeinfo', CFLAGS_FOR_TARGET='-noixemul')
-  make('{gcc}', 'install-gcc', MAKEINFO='makeinfo', CFLAGS_FOR_TARGET='-noixemul')
+  make('{gcc}', 'all-gcc',
+       MAKEINFO='makeinfo', CFLAGS_FOR_TARGET='-noixemul')
+  make('{gcc}', 'install-gcc',
+       MAKEINFO='makeinfo', CFLAGS_FOR_TARGET='-noixemul')
 
   unpack('libamiga', top_dir='.')
   install_libamiga()
@@ -360,6 +374,159 @@ def clean():
   rmtree('{tmpdir}')
 
 
+def read_sdk(filename):
+  phase = 'info'
+  info = {}
+  files = []
+
+  for line in open(filename):
+    line = line.strip()
+
+    if phase == 'info':
+      if line == '':
+        phase = 'files'
+      else:
+        fields = [field.strip() for field in line.split(':', 1)]
+        info[string.lower(fields[0])] = fields[1]
+    elif phase == 'files':
+      if ':' in line:
+        fields = [field.strip() for field in re.split('[: ]+', line)]
+        files.append(tuple(fields))
+      elif '=' in line:
+        fields = [field.strip() for field in line.split('=')]
+        files.append(tuple(['file'] + fields))
+      else:
+        files.append(('file', line))
+
+  return (info, files)
+
+
+def list_sdk():
+  print 'Available SDKs:'
+
+  for filename in find('{top}/sdk', include='*.sdk'):
+    info, _ = read_sdk(filename)
+    name = path.splitext(path.basename(filename))[0]
+    print ' - %s %s : %s' % (name, info['version'], info['short'])
+
+
+def add_stubs(src):
+  obj = re.sub(r'\.c$', r'.o', src)
+
+  for libdir, cflags in MULTILIB:
+    lib = path.join('{target}/lib', libdir, 'libnix/libstubs.a')
+    info('stubs: "%s" -> "%s"', obj, lib)
+    cflags = list(cflags) + ['-noixemul', '-c', '-o', obj, src]
+    execute('m68k-amigaos-gcc', '-Wall', '-O3', '-fomit-frame-pointer', *cflags)
+    execute('m68k-amigaos-ar', 'rs', lib, obj)
+    remove(obj)
+
+
+def add_lib(src, libname):
+  obj = re.sub(r'\.a$', r'.o', libname)
+
+  for libdir, cflags in MULTILIB:
+    lib = path.join('{target}/lib', libdir, libname)
+    info('lib: "%s" -> "%s"', obj, lib)
+    cflags = list(cflags) + ['-noixemul', '-c', '-o', obj, src]
+    execute('m68k-amigaos-gcc', '-Wall', '-O3', '-fomit-frame-pointer', *cflags)
+    execute('m68k-amigaos-ar', 'rcs', lib, obj)
+    remove(obj)
+
+
+@recipe('install-sdk', 1)
+def process_sdk(sdk, files):
+  with cwd(path.join('{sources}', sdk)):
+    for f in files:
+      kind = f[0]
+
+      if kind == 'fd2sfd':
+        fd, protos = f[1], f[2]
+        basename = path.splitext(path.basename(source))[0]
+        sfd = basename + '.sfd'
+        execute('fd2sfd', '-o', sfd, fd, protos)
+        copy(sfd, path.join('{target}/os-lib/sfd', sfd))
+      elif kind == 'sfdc':
+        source = f[1]
+        basename = re.sub(r'_lib.sfd$', r'', path.basename(source))
+
+        proto = path.join('{target}/os-include/proto', basename + '.h')
+        inline = path.join('{target}/os-include/inline', basename + '.h')
+        lvo = path.join('{target}/os-include/lvo', basename + '.i')
+
+        info('sfdc: %s -> %s', source, proto)
+        execute('sfdc', '--quiet', '--target=m68k-amigaos', '--mode=proto',
+                '--output=' + proto, source)
+        info('sfdc: %s -> %s', source, inline)
+        execute('sfdc', '--quiet', '--target=m68k-amigaos', '--mode=macros',
+                '--output=' + inline, source)
+        info('sfdc: %s -> %s', source, lvo)
+        execute('sfdc', '--quiet', '--target=m68k-amigaos', '--mode=lvo',
+                '--output=' + lvo, source)
+      elif kind == 'stubs':
+        filename = f[1]
+        c_file = re.sub(r'_lib\.sfd$', r'.c', path.basename(filename))
+
+        info('stubs: %s -> %s', filename, c_file)
+        execute('sfdc', '--quiet', '--target=m68k-amigaos', '--mode=autoopen',
+                '--output=' + c_file, filename)
+        add_stubs(c_file)
+      elif kind == 'lib':
+        filename = f[1]
+        c_file = re.sub(r'_lib\.sfd$', r'.c', path.basename(filename))
+
+        info('lib: %s -> %s', filename, c_file)
+        execute('sfdc', '--quiet', '--target=m68k-amigaos', '--mode=stubs',
+                '--output=' + c_file, filename)
+        add_lib(c_file, name)
+      elif kind == 'file':
+        source = f[1]
+        try:
+          name = f[2]
+        except:
+          name = path.basename(f[1])
+
+        if any(name.endswith(ext) for ext in ['.doc', '.html', '.pdf', '.ps']):
+          mkdir('{target}/doc')
+          copy(source, path.join('{target}/doc', name))
+        elif name.endswith('.guide'):
+          mkdir('{target}/guide')
+          copy(source, path.join('{target}/guide', name))
+        elif any(name.endswith(ext) for ext in ['.h', '.i']):
+          lastdir = path.basename(path.dirname(f[1]))
+          mkdir(path.join('{target}/os-include', lastdir))
+          copy(source, path.join('{target}/os-include', lastdir, name))
+        elif name.endswith('.fd'):
+          mkdir('{target}/os-lib/fd')
+          copy(source, path.join('{target}/os-lib/fd', name))
+        elif name.endswith('.sfd'):
+          mkdir('{target}/os-lib/sfd')
+          copy(source, path.join('{target}/os-lib/sfd', name))
+
+
+def install_sdk(*names):
+  environ['PATH'] = ":".join([path.join('{target}', 'bin'),
+                              path.join('{host}', 'bin'),
+                              environ['PATH']])
+
+  for name in names:
+    filename = path.join('{top}/sdk', name + '.sdk')
+
+    if not path.exists(filename):
+      panic('No SDK description file for "%s".', name)
+
+    desc, files = read_sdk(filename)
+
+    with cwd('{archives}'):
+      fetch(path.basename(desc['url']), desc['url'])
+
+    basename = path.splitext(path.basename(desc['url']))[0]
+
+    unpack(basename, top_dir='.')
+
+    process_sdk(basename, files)
+
+
 if __name__ == "__main__":
   logging.basicConfig(level=logging.DEBUG, format='%(levelname)s: %(message)s')
 
@@ -374,8 +541,11 @@ if __name__ == "__main__":
     panic('Build on %s architecture not supported!', platform.machine())
 
   parser = argparse.ArgumentParser(description='Build cross toolchain.')
-  parser.add_argument('action', choices=['build', 'clean'], default='build',
-                      help='perform action')
+  parser.add_argument('action',
+                      choices=['build', 'list-sdk', 'install-sdk', 'clean'],
+                      default='build', help='perform action')
+  parser.add_argument('args', metavar='ARGS', type=str, nargs='*',
+                      help='action arguments')
   parser.add_argument('--binutils', choices=['2.9.1'], default='2.9.1',
                       help='desired binutils version')
   parser.add_argument('--gcc', choices=['2.95.3'], default='2.95.3',
@@ -418,4 +588,5 @@ if __name__ == "__main__":
   if not path.exists('{target}'):
     mkdir('{target}')
 
-  eval(args.action + "()")
+  action = args.action.replace('-', '_')
+  globals()[action].__call__(*args.args)