diff --git a/cmd/packets/main.go b/cmd/packets/main.go
index 086567c..517d27c 100644
--- a/cmd/packets/main.go
+++ b/cmd/packets/main.go
@@ -666,6 +666,7 @@ func Install(packagepath string, serial uint) error {
 	defer L.Close()
 
 	if !Unsafe {
+		internal.SandboxDir = filepath.Join(cfg.Config.DataDir, name)
 		osObject := L.GetGlobal("os").(*lua.LTable)
 		ioObject := L.GetGlobal("io").(*lua.LTable)
 
@@ -679,6 +680,14 @@ func Install(packagepath string, serial uint) error {
 
 		L.SetGlobal("path_join", L.NewFunction(internal.Ljoin))
 
+		// Packets build functions
+		build := L.NewTable()
+
+		L.SetField(build, "requirements", L.NewFunction(internal.CompileRequirements))
+		L.SetField(build, "compile", L.NewFunction(internal.LuaCompile))
+
+		L.SetGlobal("build", build)
+
 		osObject.RawSetString("execute", lua.LNil)
 		osObject.RawSetString("exit", lua.LNil)
 		osObject.RawSetString("getenv", lua.LNil)
@@ -1665,6 +1674,7 @@ func Upgrade(packagepath string, og_realname string, serial uint) error {
 	defer L.Close()
 
 	if !Unsafe {
+		internal.SandboxDir = filepath.Join(cfg.Config.DataDir, name)
 		osObject := L.GetGlobal("os").(*lua.LTable)
 		ioObject := L.GetGlobal("io").(*lua.LTable)
 
@@ -1678,6 +1688,14 @@ func Upgrade(packagepath string, og_realname string, serial uint) error {
 
 		L.SetGlobal("path_join", L.NewFunction(internal.Ljoin))
 
+		// Packets build functions
+		build := L.NewTable()
+
+		L.SetField(build, "requirements", L.NewFunction(internal.CompileRequirements))
+		L.SetField(build, "compile", L.NewFunction(internal.LuaCompile))
+
+		L.SetGlobal("build", build)
+
 		osObject.RawSetString("execute", lua.LNil)
 		osObject.RawSetString("exit", lua.LNil)
 		osObject.RawSetString("getenv", lua.LNil)