diff --git a/install/osx b/install/osx
index 474ef303..96e1aa30 100755
--- a/install/osx
+++ b/install/osx
@@ -2,11 +2,8 @@
 
 # ~/.osx — http://mths.be/osx
 
-# Ask for the administrator password upfront
-sudo -v
-
-# Keep-alive: update existing `sudo` time stamp until `.osx` has finished
-while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &
+source ~/.dotfiles/zsh/lib/util
+keep_alive
 
 
 ###############################################################################
diff --git a/install/py b/install/py
index cd6773d8..54b63d7a 100755
--- a/install/py
+++ b/install/py
@@ -4,10 +4,13 @@ if ! pkg_exists python; then
     pkg_install python
 fi
 
+source ~/.dotfiles/zsh/lib/util
+keep_alive
+
 echo_g "==> Installing plugins"
-easy_install pip
-easy_install cython
-pip install PyOpenGL PyOpenGL_accelerate
+sudo easy_install pip
+sudo easy_install cython
+sudo pip install PyOpenGL PyOpenGL_accelerate
 
 # Install sfml
 source ~/.dotfiles/install/sfml
diff --git a/install/sfml b/install/sfml
index a89a35ef..89e12a86 100755
--- a/install/sfml
+++ b/install/sfml
@@ -2,6 +2,8 @@
 
 if is_mac; then
 
+    keep_alive
+
     # Get SFML 2.1
     if [ ! -d /Library/Frameworks/SFML.framework ]; then
         echo_g "==> Installing SFML 2.1"
@@ -18,7 +20,7 @@ if is_mac; then
         sudo ./install.sh
         rm -rf ~/.temp-sfml
 
-        pip install git+git://github.com/Sonkun/python-sfml.git@v1.3
+        sudo pip install git+git://github.com/Sonkun/python-sfml.git@v1.3
     else
         echo_r "==> SFML 2.1 already installed"
     fi