diff --git a/README.md b/README.md
index c5a61b6..d9aaa13 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ You can build recipes at the same time by adding them as parameters:
 Recipe builds can be removed via the clean command e.g.:
 
     $ toolchain clean openssl
-    
+
 You can install package that don't require compilation with pip::
 
     $ toolchain pip install plyer
@@ -324,3 +324,4 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
 <a href="https://opencollective.com/kivy/sponsor/7/website" target="_blank"><img src="https://opencollective.com/kivy/sponsor/7/avatar.svg"></a>
 <a href="https://opencollective.com/kivy/sponsor/8/website" target="_blank"><img src="https://opencollective.com/kivy/sponsor/8/avatar.svg"></a>
 <a href="https://opencollective.com/kivy/sponsor/9/website" target="_blank"><img src="https://opencollective.com/kivy/sponsor/9/avatar.svg"></a>
+
diff --git a/kivy_ios/context_managers.py b/kivy_ios/context_managers.py
new file mode 100644
index 0000000..9718f4f
--- /dev/null
+++ b/kivy_ios/context_managers.py
@@ -0,0 +1,46 @@
+"""
+This module houses context managers to assist in the managing of state during
+kivy-ios builds.
+"""
+from logging import getLogger
+from contextlib import contextmanager
+from os import getcwd, chdir, environ
+from os.path import expanduser
+
+
+logger = getLogger(__name__)
+
+
+@contextmanager
+def cd(newdir):
+    """
+    Set the current working directory to `newdir` for the duration of the
+    context.
+    """
+    prevdir = getcwd()
+    logger.info("cd {}".format(newdir))
+    chdir(expanduser(newdir))
+    try:
+        yield
+    finally:
+        logger.info("cd {}".format(prevdir))
+        chdir(prevdir)
+
+
+@contextmanager
+def python_path(newdir):
+    """
+    Set the PYTHONPATH environmnet variable to `newdir` for the duraiton of the
+    context.
+    """
+    prevdir = environ.get("PYTHONPATH")
+    logger.debug("Setting PYTHONPATH to {}".format(newdir))
+    environ["PYTHONPATH"] = newdir
+    try:
+        yield
+    finally:
+        logger.debug("Setting PYTHONPATH to {}".format(prevdir))
+        if prevdir is None:
+            environ.pop("PYTHONPATH")
+        else:
+            environ["PYTHONPATH"] = prevdir
diff --git a/kivy_ios/recipes/host_setuptools3/__init__.py b/kivy_ios/recipes/host_setuptools3/__init__.py
index 449c5c3..6cffa93 100644
--- a/kivy_ios/recipes/host_setuptools3/__init__.py
+++ b/kivy_ios/recipes/host_setuptools3/__init__.py
@@ -1,9 +1,10 @@
-from kivy_ios.toolchain import Recipe, shprint, cd, cache_execution
+from kivy_ios.toolchain import Recipe, shprint, cache_execution
+from kivy_ios.context_managers import cd, python_path
 import sh
 
 
 class HostSetuptools3(Recipe):
-    depends = ["openssl", "hostpython3"]
+    depends = ["openssl", "hostpython3", "python3"]
     archs = ["x86_64"]
     version = '40.9.0'
     url = 'https://pypi.python.org/packages/source/s/setuptools/setuptools-{version}.zip'
@@ -13,8 +14,11 @@ class HostSetuptools3(Recipe):
         arch = self.filtered_archs[0]
         build_dir = self.get_build_dir(arch.arch)
         hostpython = sh.Command(self.ctx.hostpython)
-        with cd(build_dir):
-            shprint(hostpython, "setup.py", "install")
+
+        with python_path(self.ctx.site_packages_dir):
+            with cd(build_dir):
+                shprint(hostpython, "setup.py", "install",
+                        f"--prefix={self.ctx.python_prefix}")
 
 
 recipe = HostSetuptools3()
diff --git a/kivy_ios/recipes/hostpython3/__init__.py b/kivy_ios/recipes/hostpython3/__init__.py
index d5d1784..ca1d854 100644
--- a/kivy_ios/recipes/hostpython3/__init__.py
+++ b/kivy_ios/recipes/hostpython3/__init__.py
@@ -1,9 +1,11 @@
-from kivy_ios.toolchain import Recipe, cd, shprint
+from kivy_ios.toolchain import Recipe, shprint
 from os.path import join
 import os
 import sh
 import shutil
 import logging
+from kivy_ios.context_managers import cd
+
 
 logger = logging.getLogger(__name__)
 
diff --git a/kivy_ios/recipes/itsdangerous/__init__.py b/kivy_ios/recipes/itsdangerous/__init__.py
index d30dd9f..af48f75 100644
--- a/kivy_ios/recipes/itsdangerous/__init__.py
+++ b/kivy_ios/recipes/itsdangerous/__init__.py
@@ -1,5 +1,6 @@
 # pure-python package, this can be removed when we'll support any python package
-from kivy_ios.toolchain import PythonRecipe, shprint, cd
+from kivy_ios.toolchain import PythonRecipe, shprint
+from kivy_ios.context_managers import cd
 from os.path import join
 import sh
 
diff --git a/kivy_ios/recipes/netifaces/__init__.py b/kivy_ios/recipes/netifaces/__init__.py
index 0209861..33757e0 100644
--- a/kivy_ios/recipes/netifaces/__init__.py
+++ b/kivy_ios/recipes/netifaces/__init__.py
@@ -2,7 +2,8 @@ import sh
 
 from os.path import join
 
-from kivy_ios.toolchain import CythonRecipe, cd, shprint
+from kivy_ios.toolchain import CythonRecipe, shprint
+from kivy_ios.context_managers import cd
 
 
 class NetifacesRecipe(CythonRecipe):
diff --git a/kivy_ios/recipes/pycrypto/__init__.py b/kivy_ios/recipes/pycrypto/__init__.py
index 97478c0..3c49c19 100644
--- a/kivy_ios/recipes/pycrypto/__init__.py
+++ b/kivy_ios/recipes/pycrypto/__init__.py
@@ -1,6 +1,7 @@
 '''Recipe for pycrypto on ios
 '''
-from kivy_ios.toolchain import CythonRecipe, shprint, cd
+from kivy_ios.toolchain import CythonRecipe, shprint
+from kivy_ios.context_managers import cd
 from os.path import join
 import sh
 
diff --git a/kivy_ios/recipes/python3/__init__.py b/kivy_ios/recipes/python3/__init__.py
index c6ed739..4ffb113 100644
--- a/kivy_ios/recipes/python3/__init__.py
+++ b/kivy_ios/recipes/python3/__init__.py
@@ -1,4 +1,5 @@
-from kivy_ios.toolchain import Recipe, shprint, cd
+from kivy_ios.toolchain import Recipe, shprint
+from kivy_ios.context_managers import cd
 from os.path import join
 import sh
 import shutil
diff --git a/kivy_ios/toolchain.py b/kivy_ios/toolchain.py
index 67ee2a7..cd73afa 100755
--- a/kivy_ios/toolchain.py
+++ b/kivy_ios/toolchain.py
@@ -9,7 +9,7 @@ This tool intend to replace all the previous tools/ in shell script.
 import argparse
 import sys
 from sys import stdout
-from os.path import join, dirname, realpath, exists, isdir, basename, expanduser
+from os.path import join, dirname, realpath, exists, isdir, basename
 from os import listdir, unlink, makedirs, environ, chdir, getcwd, walk
 import sh
 import zipfile
@@ -21,7 +21,7 @@ import shutil
 import fnmatch
 import tempfile
 import time
-from contextlib import contextmanager, suppress
+from contextlib import suppress
 from datetime import datetime
 from pprint import pformat
 import logging
@@ -46,18 +46,6 @@ sh_logging.setLevel(logging.WARNING)
 logger = logging.getLogger(__name__)
 
 
-@contextmanager
-def cd(newdir):
-    prevdir = getcwd()
-    logger.info("cd {}".format(newdir))
-    chdir(expanduser(newdir))
-    try:
-        yield
-    finally:
-        logger.info("cd {}".format(prevdir))
-        chdir(prevdir)
-
-
 def shprint(command, *args, **kwargs):
     kwargs["_iter"] = True
     kwargs["_out_bufsize"] = 1