diff --git a/bin/build b/bin/build
index cb7f8cf..260522e 100755
--- a/bin/build
+++ b/bin/build
@@ -37,25 +37,28 @@ nvm use deploy
 printf "Initializing Meteor environment.\n"
 cp -R /opt/home/.meteor $HOME
 
-# Demeteorizer flags
-# TODO Test for demeteorizer flags
-# --json || --debug
-
 cd $INPUT_DIR
 METEOR_VERSION=$(cat $INPUT_DIR/.meteor/release)
 printf "Using $METEOR_VERSION.\n"
 
-if [[ -f $INPUT_DIR/package.json ]]; then
-  printf "Installing root package.json dependencies.\n"
-  npm install --production
+FLAGS="--server-only --output $OUTPUT_DIR"
+
+if [[ $NPM ]]; then
+  printf "NPM version $NPM specified.\n"
+  FLAGS="$FLAGS --npm-version $NPM"
 fi
 
-demeteorizer --server-only --output $OUTPUT_DIR
+if [[ $NODE ]]; then
+  printf "Node version $NODE specified.\n"
+  FLAGS="$FLAGS --node-version $NODE"
+fi
 
-if [[ -d $INPUT_DIR/node_modules ]]; then
-  mv $INPUT_DIR/node_modules $OUTPUT_DIR
+if [[ $DEBUG ]]; then
+  FLAGS="$FLAGS --debug"
 fi
 
+demeteorizer $FLAGS
+
 # Searches a directory top-down looking for a file.
 findFile() {
   find $2 -name $1 ! -path "*/node_modules/*" ! -path ".git/*" | \
@@ -65,15 +68,34 @@ findFile() {
   head -n 1
 }
 
-# Recursively search input directory for a package.json
+# Recursively search output directory for a package.json
 PACKAGE_PATH=$(findFile "package.json" $OUTPUT_DIR/bundle/programs/server)
+export PACKAGE_PATH
 
-if [[ $PACKAGE_PATH ]]; then
-  export PACKAGE_PATH
+NODE_VERSION=$(get-version --engine node $PACKAGE_PATH 2>/dev/null) || true
+NPM_VERSION=$(get-version --engine npm $PACKAGE_PATH 2>/dev/null) || true
 
-  if [[ $NPM_USER ]] && [[ $NPM_PASSWORD ]] && [[ $NPM_EMAIL ]]; then
-    npm-login
-  fi
+if [[ 'v$NODE_VERSION' != $(node -v) ]]; then
+  nvm install $NODE_VERSION > /dev/null 2>&1
+fi
 
-  npm-install
+if [[ $NPM_VERSION  != $(npm -v) ]]; then
+  npm install npm@$NPM_VERSION --global > /dev/null 2>&1
 fi
+
+nvm alias deploy $(nvm current)
+
+if [[ $NPM_USER ]] && [[ $NPM_PASSWORD ]] && [[ $NPM_EMAIL ]]; then
+  npm-login
+fi
+
+if [[ -f $INPUT_DIR/package.json ]]; then
+  printf "Installing root package.json dependencies.\n"
+  npm install --production
+fi
+
+if [[ -d $INPUT_DIR/node_modules ]]; then
+  mv $INPUT_DIR/node_modules $OUTPUT_DIR
+fi
+
+npm-install
diff --git a/bootstrap.sh b/bootstrap.sh
index 129e5df..8e824a3 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -10,9 +10,9 @@ export TMP_DIR=/tmp
 # Other environment variables
 export NVM_DIR=/opt/nvm
 export PROFILE=$HOME/.profile
-export DEMETEORIZER_VERSION=3.1.0
-export NODE_VERSION=0.10.41
-export NPM_VERSION=3.9.6
+export DEMETEORIZER_VERSION=4.0.0
+export NODE_VERSION=4.4.7
+export NPM_VERSION=3.10.5
 
 # Create $HOME/.profile and export environment variable
 if [[ ! -d $HOME ]]; then