diff --git a/apis/blocks.lua b/apis/blocks.lua
index ce1d91d..af2f61b 100644
--- a/apis/blocks.lua
+++ b/apis/blocks.lua
@@ -42,8 +42,7 @@ local blockDB = TableDB()
 
 function blockDB:load()
 
-  local dir = fs.getDir(shell.getRunningProgram())
-  local blocks = JSON.decodeFromFile(fs.combine(dir, 'etc/blocks.json'))
+  local blocks = JSON.decodeFromFile('usr/etc/blocks.json'))
 
   if not blocks then
     error('Unable to read blocks.json')
diff --git a/apps/builder.lua b/apps/builder.lua
index 020fb1b..f4a1dbb 100644
--- a/apps/builder.lua
+++ b/apps/builder.lua
@@ -3,7 +3,6 @@ if not turtle and not commands then
 end
 
 requireInjector(getfenv(1))
-package.path = package.path .. ':/' .. fs.getDir(shell.getRunningProgram()) .. '/apis'
 
 local Blocks    = require('blocks')
 local class     = require('class')
diff --git a/apps/trace.lua b/apps/trace.lua
new file mode 100644
index 0000000..ca79b6e
--- /dev/null
+++ b/apps/trace.lua
@@ -0,0 +1,52 @@
+local args = {...}
+
+if not args[1] then
+	print("Usage:")
+	print(shell.getRunningProgram() .. " <program> [program arguments, ...]")
+	return
+end
+
+local path = shell.resolveProgram(args[1]) or shell.resolve(args[1])
+
+-- here be dragons
+if fs.exists(path) then
+	local eshell = setmetatable({getRunningProgram=function() return path end}, {__index = shell})
+	local env = setmetatable({shell=eshell}, {__index=_ENV})
+	
+	local f = fs.open(path, "r")
+	local d = f.readAll()
+	f.close()
+	
+	local func, e = load(d, fs.getName(path), nil, env)
+	if not func then
+		printError("Syntax error:")
+		printError("  " .. e)
+	else
+		table.remove(args, 1)
+		xpcall(function() func(unpack(args)) end, function(err)
+			local trace = {}
+			local i, hitEnd, _, e = 4, false
+			repeat
+				_, e = pcall(function() error("<tracemarker>", i) end)
+				i = i + 1
+				if e == "xpcall: <tracemarker>" then
+					hitEnd = true
+					break
+				end
+				table.insert(trace, e)
+			until i > 10
+			table.remove(trace)
+			if err:match("^" .. trace[1]:match("^(.-:%d+)")) then table.remove(trace, 1) end
+			printError("\nProgram has crashed! Stack trace:")
+			printError(err)
+			for i, v in ipairs(trace) do
+				printError("  at " .. v:match("^(.-:%d+)"))
+			end
+			if not hitEnd then
+				printError("  ...")
+			end
+		end)
+	end
+else
+	printError("program not found")
+end
diff --git a/apps/webapp.lua b/apps/webapp.lua
new file mode 100644
index 0000000..883de3f
--- /dev/null
+++ b/apps/webapp.lua
@@ -0,0 +1,52 @@
+local args = { ... }
+local GIT_REPO = 'kepler155c/opus/develop'
+local BASE = 'https://raw.githubusercontent.com/' .. GIT_REPO
+
+local function dourl(env, url)
+  local h = http.get(url)
+  if h then
+    local fn, m = load(h.readAll(), url, nil, env)
+    h.close()
+    if fn then
+      return fn()
+    end
+  end
+  error('Failed to download ' .. url)
+end
+
+local s, m = pcall(function()
+
+  _G.requireInjector = dourl(getfenv(1), BASE .. '/sys/apis/injector.lua')
+
+  local function mkenv()
+    local env = { }
+    for k,v in pairs(getfenv(1)) do
+      env[k] = v 
+    end
+    setmetatable(env, { __index = _G })
+    return env
+  end
+
+  -- install vfs
+  dourl(mkenv(), BASE .. '/sys/extensions/vfs.lua')
+
+  -- install filesystem
+  fs.mount('',    'gitfs', GIT_REPO)
+  fs.mount('usr', 'gitfs', 'kepler155c/opus-apps/develop')
+
+  -- start program
+  local file = table.remove(args, 1)
+
+  local s, m = os.run(mkenv(), file or 'startup', unpack(args))
+  if not s and m then
+    error(m)
+  end
+end)
+
+if not s and m then
+  printError(m)
+end
+
+if fs.restore then
+  fs.restore()
+end
diff --git a/etc/scripts/update b/etc/scripts/update
index 484beb1..66522e1 100644
--- a/etc/scripts/update
+++ b/etc/scripts/update
@@ -1 +1 @@
-shell.run('/apps/update.lua')
+shell.run('http://pastebin.com/raw/sj4VMVJj automatic')