diff --git a/build.lua b/build.lua
index dc2178fb8..24dcb39b4 100644
--- a/build.lua
+++ b/build.lua
@@ -9,6 +9,7 @@ vars.plats = {
 	"linux386",
 	"linux68k",
 	"pc86",
+	"rpi",
 }
 
 installable {
@@ -21,6 +22,7 @@ installable {
 		"plat/cpm+pkg",
 		"plat/linux386+pkg",
 		"plat/linux68k+pkg",
+		"plat/rpi+pkg",
 		"plat/pc86+pkg",
 		"util/ack+pkg",
 		"util/amisc+pkg",
diff --git a/mach/proto/as/build.lua b/mach/proto/as/build.lua
index 37f6cd336..6d846682e 100644
--- a/mach/proto/as/build.lua
+++ b/mach/proto/as/build.lua
@@ -10,7 +10,10 @@ definerule("build_as",
 		local archlib = clibrary {
 			name = e.name.."/archlib",
 			srcs = {},
-			hdrs = { "mach/"..e.arch.."/as/mach*.c" }
+			hdrs = {
+				"mach/"..e.arch.."/as/mach*.c",
+				"mach/"..e.arch.."/as/*.h"
+			}
 		}
 
 		local preprocessedy = cppfile {
diff --git a/mach/vc4/libem/build.lua b/mach/vc4/libem/build.lua
new file mode 100644
index 000000000..ca5a13c65
--- /dev/null
+++ b/mach/vc4/libem/build.lua
@@ -0,0 +1,8 @@
+for _, plat in ipairs(vars.plats) do
+	acklibrary {
+		name = "lib_"..plat,
+		srcs = { "./*.s" },
+		vars = { plat = plat },
+	}
+end
+
diff --git a/mach/vc4/libend/build.lua b/mach/vc4/libend/build.lua
new file mode 100644
index 000000000..ca5a13c65
--- /dev/null
+++ b/mach/vc4/libend/build.lua
@@ -0,0 +1,8 @@
+for _, plat in ipairs(vars.plats) do
+	acklibrary {
+		name = "lib_"..plat,
+		srcs = { "./*.s" },
+		vars = { plat = plat },
+	}
+end
+
diff --git a/plat/rpi/build-pkg.lua b/plat/rpi/build-pkg.lua
new file mode 100644
index 000000000..b6bc4ab56
--- /dev/null
+++ b/plat/rpi/build-pkg.lua
@@ -0,0 +1,25 @@
+include("plat/build.lua")
+
+ackfile {
+	name = "boot",
+	srcs = { "./boot.s" },
+	vars = { plat = "rpi" }
+}
+
+build_plat_libs {
+	name = "libs",
+	arch = "vc4",
+	plat = "rpi",
+}
+
+installable {
+	name = "pkg",
+	map = {
+		"+tools",
+		"+libs",
+        "./include+pkg",
+		["$(PLATIND)/rpi/boot.o"] = "+boot",
+        ["$(PLATIND)/rpi/libsys.a"] = "./libsys+lib",
+	}
+}
+
diff --git a/plat/rpi/build-tools.lua b/plat/rpi/build-tools.lua
new file mode 100644
index 000000000..eb3cbfef2
--- /dev/null
+++ b/plat/rpi/build-tools.lua
@@ -0,0 +1,21 @@
+include("plat/build.lua")
+
+build_as {
+	name = "as",
+	arch = "vc4",
+}
+
+build_ncg {
+	name = "ncg",
+	arch = "vc4",
+}
+
+return installable {
+	name = "tools",
+	map = {
+		["$(PLATDEP)/rpi/as"] = "+as",
+		["$(PLATDEP)/rpi/ncg"] = "+ncg",
+		["$(PLATIND)/descr/rpi"] = "./descr",
+		"util/opt+pkg",
+	}
+}
diff --git a/plat/rpi/include/build.lua b/plat/rpi/include/build.lua
new file mode 100644
index 000000000..4e6b8521b
--- /dev/null
+++ b/plat/rpi/include/build.lua
@@ -0,0 +1,27 @@
+include("plat/build.lua")
+
+headermap = {}
+packagemap = {}
+
+local function addheader(h)
+	headermap[h] = "./"..h
+	packagemap["$(PLATIND)/rpi/include/"..h] = "./"..h
+end
+
+addheader("ack/config.h")
+addheader("pi.h")
+addheader("sys/select.h")
+addheader("termios.h")
+addheader("unistd.h")
+
+acklibrary {
+	name = "headers",
+	hdrs = headermap
+}
+
+installable {
+	name = "pkg",
+	map = packagemap
+}
+
+
diff --git a/plat/rpi/libsys/build.lua b/plat/rpi/libsys/build.lua
new file mode 100644
index 000000000..db579d41b
--- /dev/null
+++ b/plat/rpi/libsys/build.lua
@@ -0,0 +1,15 @@
+acklibrary {
+    name = "lib",
+    srcs = {
+        "./*.c",
+        "./*.s",
+    },
+	deps = {
+		"lang/cem/libcc.ansi/headers+headers",
+		"plat/rpi/include+headers",
+	},
+    vars = {
+        plat = "rpi"
+    }
+}
+