diff --git a/README.md b/README.md
index 9184154..e54d2d0 100644
--- a/README.md
+++ b/README.md
@@ -1,19 +1,34 @@
-# Heroku buildpack: Haskell
+# Heroku Buildpack: Haskell
 
 This is a [Heroku buildpack](http://devcenter.heroku.com/articles/buildpacks)
-for Haskell apps. It uses cabal-1.14.0.
+for Haskell apps. It uses GHC 7.4.1 and cabal-1.16.0.1.
+
+## Demo
+
+A demo is online here:
+
+http://haskell-buildpack-demo.herokuapp.com/
+
+The demo repo is here:
+
+https://github.com/pufuwozu/haskell-buildpack-demo
 
 ## Usage
 
     $ ls
     Procfile app.cabal src
 
-    $ heroku create --stack=cedar --buildpack https://github.com/luciferous/heroku-buildpack-haskell.git
+    $ heroku create --stack=cedar --buildpack https://github.com/pufuwozu/heroku-buildpack-haskell.git
 
     $ git push heroku master
     ...
+
     -----> Heroku receiving push
+    -----> Fetching custom git buildpack... done
     -----> Haskell app detected
-    -----> Building app with cabal
-    -----> Running: cabal install
-
+    -----> Downloading GHC
+    ######################################################################## 100.0%
+    -----> Downloading Cabal
+    ######################################################################## 100.0%
+    -----> Setting up ghc-pkg
+    ...
diff --git a/bin/compile b/bin/compile
index 60b549a..730c67a 100755
--- a/bin/compile
+++ b/bin/compile
@@ -7,42 +7,59 @@ set -eo pipefail
 BUILD_DIR=$1
 CACHE_DIR=$2
 
-cd $BUILD_DIR
+FIXED_HOME=/app
 
 mkdir -p $CACHE_DIR
 
-cp -R $CACHE_DIR/ghc ghc &> /dev/null || true
-cp -R $CACHE_DIR/cabal .cabal &> /dev/null || true
-
-if [ ! -e ghc ]; then
-  GHC_URL="http://s3.amazonaws.com/heroku-buildpack-haskell/ghc.tar.gz"
+if [ ! -e $CACHE_DIR/ghc ]; then
+  GHC_URL="http://informatik.uni-kiel.de/~sad/ghc.tar.gz"
   echo "-----> Downloading GHC"
-  curl -# --max-time 120 -L "$GHC_URL" | tar xz
+  curl -# --max-time 120 -L "$GHC_URL" | tar xz -C $CACHE_DIR
+fi
+
+# Restore GHC registry if available
+if [ -e $CACHE_DIR/dotghc ]; then
+  rm -rf $FIXED_HOME/app/.ghc
+  mv $CACHE_DIR/dotghc $FIXED_HOME/.ghc
 fi
 
-if [ ! -e .cabal ]; then
-  CABAL_URL="http://s3.amazonaws.com/heroku-buildpack-haskell/cabal.tar.gz"
-  echo "-----> Bundling Cabal"
-  curl -# --max-time 120 -L "$CABAL_URL" | tar xz
+# Fix directory
+mv $CACHE_DIR/ghc $FIXED_HOME
+
+# Restore Cabal cache or download an empty environemt
+if [ -e $CACHE_DIR/cabal ]; then
+  rm -rf $FIXED_HOME/.cabal
+  mv $CACHE_DIR/cabal $FIXED_HOME/.cabal
+elif [ ! -e $FIXED_HOME/.cabal ]; then
+  CABAL_URL="http://informatik.uni-kiel.de/~sad/cabal.tar.gz"
+  echo "-----> Downloading Cabal"
+  curl -# --max-time 120 -L "$CABAL_URL" | tar xz -C $FIXED_HOME
 fi
 
-mkdir -p bin
-ln -s ghc/bin/ghc bin/ghc
-ln -s .cabal/bin/cabal bin/cabal
+# Set LD_LIBRARAY_PATH and link essential libraries
+mkdir -p $FIXED_HOME/usr/lib
+ln -s /usr/lib/libgmp.so.3.5.2 $FIXED_HOME/usr/lib/libgmp.so
+export LD_LIBRARY_PATH=$FIXED_HOME/usr/lib
 
-mkdir -p lib
-ln -s /usr/lib/libgmp.so.3 lib/libgmp.so
+# Set PATH
+export PATH=$FIXED_HOME/ghc/bin:$FIXED_HOME/.cabal/bin$PATH
 
-ghc/bin/ghc-pkg describe base > base.conf
-sed -i "s#ld-options:#ld-options: -L`pwd`/lib#"
-ghc/bin/ghc-pkg update base.conf
-rm base.conf
+echo "-----> Updating Cabal"
+cabal update
 
-.cabal/bin/cabal update
-.cabal/bin/cabal install
+echo "-----> Release the hounds! Installing application"
+cd $BUILD_DIR
+cabal install -j5 --disable-library-profiling --disable-executable-profiling --disable-shared
 
-rm -rf $CACHE_DIR/ghc
-cp -R ghc $CACHE_DIR/ghc
+echo "-----> Caching Cabal packages"
+echo $FIXED_HOME/.ghc
+shopt -s extglob
+rm $FIXED_HOME/.cabal/bin/!(cabal|happy)
+mv $FIXED_HOME/.cabal $CACHE_DIR/cabal
+mv $FIXED_HOME/ghc $CACHE_DIR/ghc
+mv $FIXED_HOME/.ghc $CACHE_DIR/dotghc
 
-rm -rf $CACHE_DIR/cabal
-cp -R .cabal $CACHE_DIR/cabal
+echo "Cache dir size:"
+du -ms $CACHE_DIR
+echo "Build dir size:"
+du -ms $BUILD_DIR
diff --git a/bin/detect b/bin/detect
index 014359c..71bf985 100755
--- a/bin/detect
+++ b/bin/detect
@@ -1,6 +1,6 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
 if test -n "$(find "$1" -maxdepth 1 -name '*.cabal' -print -quit)"
-then echo Haskell
-else echo no; exit 1
+then echo Haskell; exit 0
+else exit 1
 fi
diff --git a/bin/release b/bin/release
index 7c14edd..0d130af 100755
--- a/bin/release
+++ b/bin/release
@@ -1,9 +1,3 @@
 #!/bin/sh
 
-$BUILD_DIR=$1
-
-cat <<EOF
----
-config_vars:
-  PATH: $BUILD_DIR/.cabal/bin:$BUILD_DIR/bin:/usr/local/bin:/usr/bin:/bin
-EOF
+echo "--- {}"
diff --git a/precompile-binaries.sh b/precompile-binaries.sh
index bd63baa..bd4f554 100644
--- a/precompile-binaries.sh
+++ b/precompile-binaries.sh
@@ -11,29 +11,56 @@ cd ghc-7.4.1/
 make install
 cd ..
 
+# GHC space trimming (risky business)
+
+# Remove haddock and hpc - no docs or coverage
+rm $HOME/ghc/bin/haddock*
+rm $HOME/ghc/lib/ghc-7.4.1/haddock
+rm -r $HOME/ghc/lib/ghc-7.4.1/html
+rm -r $HOME/ghc/lib/ghc-7.4.1/latex
+# rm $HOME/ghc/bin/hp*
+# rm -r $HOME/ghc/lib/ghc-7.4.1/hp*
+# rm -r $HOME/ghc/lib/ghc-7.4.1/package.conf.d/hpc-0.5.1.1-*
+# rm -r $HOME/ghc/lib/ghc-7.4.1/ghc-7.4.1
+# rm -r $HOME/ghc/lib/ghc-7.4.1/package.conf.d/ghc-7.4.1-*
+# rm -r $HOME/ghc/lib/ghc-7.4.1/package.conf.d/package.cache
+echo "" > $HOME/ghc/lib/ghc-7.4.1/ghc-usage.txt
+echo "" > $HOME/ghc/lib/ghc-7.4.1/ghci-usage.txt
+
+# Remove duplicate libs
+find $HOME/ghc/lib -name "*_p.a" -delete
+find $HOME/ghc/lib -name "*.p_hi" -delete
+find $HOME/ghc/lib -name "*.dyn_hi" -delete
+find $HOME/ghc/lib -name "*HS*.so" -delete
+find $HOME/ghc/lib -name "*HS*.o" -delete
+find $HOME/ghc/lib -name "*_debug.a" -delete
+
+# Don't need man or doc
+rm -rf $HOME/ghc/share
+
+# Strip binaries
+strip --strip-unneeded $HOME/ghc/lib/ghc-7.4.1/{run,}ghc
+
+export PATH=$PATH:$HOME/ghc/bin
+
 # ldconfig for linker hack
-$HOME/ghc/bin/ghc-pkg describe base > base.package.conf
+ghc-pkg describe base > base.package.conf
 sed -i "s/ld-options:/ld-options:\ -L\/app\/usr\/lib/" base.package.conf
-$HOME/ghc/bin/ghc-pkg update base.package.conf
-
-# haskell-platform (disabled because it requires opengl)
-#curl --silent http://lambda.haskell.org/platform/download/2011.4.0.0/haskell-platform-2011.4.0.0.tar.gz|tar xz
-#cd haskell-platform-2011.4.0.0/
-
-# cabal
-curl --silent http://www.haskell.org/cabal/release/cabal-1.14.0/Cabal-1.14.0.tar.gz|tar xz
-cd Cabal-1.14.0/
-$HOME/ghc/bin/ghc --make Setup
-./Setup configure --user --with-ghc=$HOME/ghc/bin/ghc
-./Setup build
-./Setup install
-cd ..
+ghc-pkg update base.package.conf
 
 # cabal-install
-curl --silent http://www.haskell.org/cabal/release/cabal-install-0.14.0/cabal-install-0.14.0.tar.gz|tar xz
-cd cabal-install-0.14.0/
-PATH=$PATH:$HOME/ghc/bin sh bootstrap.sh
+curl --silent http://hackage.haskell.org/packages/archive/cabal-install/1.16.0.1/cabal-install-1.16.0.1.tar.gz|tar xz
+cd cabal-install-1.16.0.1/
+sh bootstrap.sh
 cd ..
 
+export PATH=$PATH:$HOME/.cabal
+
+# Install a binary that Yesod needs separately
+cabal update
+cabal install happy
+find $HOME/.cabal -name "*HS*.o" -delete
+rm -rf $HOME/.cabal/{config,share,packages,logs}
+
 tar cvzf ghc.tar.gz ghc
 tar cvzf cabal.tar.gz .cabal
diff --git a/tmp/README.md b/tmp/README.md
deleted file mode 100644
index e69de29..0000000
diff --git a/tmp/index.php b/tmp/index.php
deleted file mode 100755
index e69de29..0000000