diff --git a/basic-runtimes/alpine.lxcfile b/basic-runtimes/alpine.lxcfile
index cddc190..5aba891 100644
--- a/basic-runtimes/alpine.lxcfile
+++ b/basic-runtimes/alpine.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 
 SCRIPT
diff --git a/basic-runtimes/java.lxcfile b/basic-runtimes/java.lxcfile
index 3214421..bd83c79 100644
--- a/basic-runtimes/java.lxcfile
+++ b/basic-runtimes/java.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/java
 
diff --git a/basic-runtimes/libxml.lxcfile b/basic-runtimes/libxml.lxcfile
index 3fe2155..e92d22d 100644
--- a/basic-runtimes/libxml.lxcfile
+++ b/basic-runtimes/libxml.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/libxml
 
diff --git a/basic-runtimes/nodejs.lxcfile b/basic-runtimes/nodejs.lxcfile
new file mode 100644
index 0000000..3f66221
--- /dev/null
+++ b/basic-runtimes/nodejs.lxcfile
@@ -0,0 +1,7 @@
+IMAGE build
+LAYER shared/alpine
+LAYER shared/nodejs
+
+SCRIPT
+    apk --no-cache add nodejs
+RUN
diff --git a/basic-runtimes/php.lxcfile b/basic-runtimes/php.lxcfile
index b663d4f..47158e4 100644
--- a/basic-runtimes/php.lxcfile
+++ b/basic-runtimes/php.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/php
 
diff --git a/basic-runtimes/python2.lxcfile b/basic-runtimes/python2.lxcfile
index d226748..443b885 100644
--- a/basic-runtimes/python2.lxcfile
+++ b/basic-runtimes/python2.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/libxml
 LAYER shared/python2
diff --git a/basic-runtimes/python3.lxcfile b/basic-runtimes/python3.lxcfile
index b7c4094..66ee91d 100644
--- a/basic-runtimes/python3.lxcfile
+++ b/basic-runtimes/python3.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/libxml
 LAYER shared/python2
diff --git a/basic-runtimes/ruby.lxcfile b/basic-runtimes/ruby.lxcfile
index 208d10e..9cdb62e 100644
--- a/basic-runtimes/ruby.lxcfile
+++ b/basic-runtimes/ruby.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/ruby
 
diff --git a/basic-runtimes/tomcat.lxcfile b/basic-runtimes/tomcat.lxcfile
index efa6738..49f0627 100644
--- a/basic-runtimes/tomcat.lxcfile
+++ b/basic-runtimes/tomcat.lxcfile
@@ -1,3 +1,4 @@
+IMAGE build
 LAYER shared/alpine
 LAYER shared/java
 LAYER shared/tomcat
diff --git a/build-all.sh b/build-all.sh
index ad26911..5e4666d 100755
--- a/build-all.sh
+++ b/build-all.sh
@@ -3,8 +3,8 @@ set -e
 
 SOURCE_DIR=$(realpath $(dirname "${0}"))
 
-# Copy lxc-build
-cp ${SOURCE_DIR}/lxc-build /usr/bin/lxc-build
+# Alias lxc-build
+alias lxc-build=${SOURCE_DIR}/lxc-build
 
 # Build basic Alpine LXC image
 mkdir -p /var/lib/lxc/shared/alpine
@@ -12,12 +12,13 @@ wget https://github.com/gliderlabs/docker-alpine/raw/2bfe6510ee31d86cfeb2f37587f
 touch /var/lib/lxc/shared/alpine/etc/resolv.conf
 lxc-build ${SOURCE_DIR}/basic-runtimes/alpine.lxcfile
 
-# Build runtime overlays
+# Build shared overlays
 lxc-build ${SOURCE_DIR}/basic-runtimes/java.lxcfile
 lxc-build ${SOURCE_DIR}/basic-runtimes/libxml.lxcfile
 #lxc-build ${SOURCE_DIR}/basic-runtimes/php.lxcfile
 lxc-build ${SOURCE_DIR}/basic-runtimes/python2.lxcfile
 lxc-build ${SOURCE_DIR}/basic-runtimes/python3.lxcfile
+#lxc-build ${SOURCE_DIR}/basic-runtimes/nodejs.lxcfile
 #lxc-build ${SOURCE_DIR}/basic-runtimes/ruby.lxcfile
 #lxc-build ${SOURCE_DIR}/basic-runtimes/tomcat.lxcfile
 
diff --git a/lxc-build b/lxc-build
index 8b8b316..1a6de5f 100755
--- a/lxc-build
+++ b/lxc-build
@@ -5,15 +5,6 @@ import shutil
 import subprocess
 import sys
 
-image = 'build'
-layers = []
-mounts = []
-uid = 0
-gid = 0
-cmd = '/bin/sh'
-script = []
-in_script = False
-
 LXC_ROOT = '/var/lib/lxc'
 CONFIG_TEMPLATE = '''# Image name
 lxc.uts.name = {image}
@@ -46,47 +37,22 @@ lxc.cap.drop = sys_admin
 lxc.include = /usr/share/lxc/config/alpine.common.conf
 '''
 
+image = None
+layers = []
+mounts = []
+uid = 0
+gid = 0
+cmd = '/bin/sh'
+script = []
+in_script = False
+
 if os.path.isfile(sys.argv[1]):
     lxcfile = os.path.realpath(sys.argv[1])
-    build_context = os.path.basepath(lxcfile)
+    build_context = os.path.dirname(lxcfile)
 else:
     build_context = os.path.realpath(sys.argv[1])
     lxcfile = os.path.join(build_context, 'lxcfile')
 
-def main():
-    with open(lxcfile, 'r') as fd:
-        recipe = fd.readlines()
-
-    for line in recipe:
-        if line == 'RUN':
-            in_script = False
-            run_script()
-        elif in_script and not line and not line.startswith('#'):
-            script.append()
-        elif line == 'SCRIPT':
-            script = []
-            in_script = True
-        elif line.startswith('IMAGE'):
-            image = line.split()[1]
-            os.makedirs(os.path.join(LXC_ROOT, image), 0o755, True)
-        elif line.startswith('LAYER'):
-            layers.append(line.split()[1])
-            rebuild_config()
-            fix_world()
-        elif line.startswith('COPY'):
-            copy_files(*line.split()[1:2])
-        elif line.startswith('MOUNT'):
-            mounts.append(line.split()[1])
-            rebuild_config()
-        elif line.startswith('USER'):
-            uid = line.split()[1]
-            gid = line.split()[2]
-            rebuild_config()
-        elif line.startswith('CMD'):
-            cmd = line.split()[1]
-            rebuild_config()
-    layers.append('{}/delta0'.format(image))
-
 def rebuild_config():
     rootfs_layers = [os.path.join(LXC_ROOT, l) for l in layers]
     for layer in rootfs_layers:
@@ -125,5 +91,36 @@ def copy_files(src, dst):
     dst = os.path.join(LXC_ROOT, layers[-1], dst)
     shutil.copytree(src, dst)
 
-if __name__ == '__init__':
-    main()
+with open(lxcfile, 'r') as fd:
+    recipe = fd.readlines()
+
+for line in recipe:
+    if line == 'RUN':
+        in_script = False
+        run_script()
+    elif in_script and not line and not line.startswith('#'):
+        script.append()
+    elif line == 'SCRIPT':
+        script = []
+        in_script = True
+    elif line.startswith('IMAGE'):
+        image = line.split()[1]
+        os.makedirs(os.path.join(LXC_ROOT, image), 0o755, True)
+    elif line.startswith('LAYER'):
+        layers.append(line.split()[1])
+        rebuild_config()
+    elif line == 'FIXWORLD':
+        fix_world()
+    elif line.startswith('COPY'):
+        copy_files(*line.split()[1:2])
+    elif line.startswith('MOUNT'):
+        mounts.append(line.split()[1])
+        rebuild_config()
+    elif line.startswith('USER'):
+        uid = line.split()[1]
+        gid = line.split()[2]
+        rebuild_config()
+    elif line.startswith('CMD'):
+        cmd = line.split()[1]
+        rebuild_config()
+layers.append('{}/delta0'.format(image))