diff --git a/mach/proto/fp/FP.script b/mach/proto/fp/FP.script
deleted file mode 100644
index a8f12982a..000000000
--- a/mach/proto/fp/FP.script
+++ /dev/null
@@ -1,40 +0,0 @@
-g/_adf4/s//.adf4/g
-g/_adf8/s//.adf8/g
-g/_cff4/s//.cff4/g
-g/_cff8/s//.cff8/g
-g/_cfi/s//.cfi/g
-g/_cfu/s//.cfu/g
-g/_cif4/s//.cif4/g
-g/_cif8/s//.cif8/g
-g/_cmf4/s//.cmf4/g
-g/_cmf8/s//.cmf8/g
-g/_cuf4/s//.cuf4/g
-g/_cuf8/s//.cuf8/g
-g/_dvf4/s//.dvf4/g
-g/_dvf8/s//.dvf8/g
-g/_fef4/s//.fef4/g
-g/_fef8/s//.fef8/g
-g/_fif4/s//.fif4/g
-g/_fif8/s//.fif8/g
-g/_mlf4/s//.mlf4/g
-g/_mlf8/s//.mlf8/g
-g/_ngf4/s//.ngf4/g
-g/_ngf8/s//.ngf8/g
-g/_sbf4/s//.sbf4/g
-g/_sbf8/s//.sbf8/g
-g/_zrf4/s//.zrf4/g
-g/_zrf8/s//.zrf8/g
-g/_add_ext/s//.add_ext/g
-g/_div_ext/s//.div_ext/g
-g/_mul_ext/s//.mul_ext/g
-g/_nrm_ext/s//.nrm_ext/g
-g/_sft_ext/s//.sft_ext/g
-g/_sub_ext/s//.sub_ext/g
-g/_zrf_ext/s//.zrf_ext/g
-g/_compact/s//.compact/g
-g/_extend/s//.extend/g
-g/_b64_add/s//.b64_add/g
-g/_b64_sft/s//.b64_sft/g
-g/_b64_rsft/s//.b64_rsft/g
-g/_b64_lsft/s//.b64_lsft/g
-1,$p
diff --git a/mach/proto/fp/build.lua b/mach/proto/fp/build.lua
index db4bd7b59..8ea46b5be 100644
--- a/mach/proto/fp/build.lua
+++ b/mach/proto/fp/build.lua
@@ -69,17 +69,16 @@ for _, plat in ipairs({"cpm"}) do
 			}
 		}
 
-		-- Run FP.script to edit the assembly code.
+		-- Run massage_s.lua to edit the assembly code.
 		edits[#edits+1] = normalrule {
 			name = "ed_"..plat.."/"..n,
 			ins = {
-				"./FP.script",
-				"util/cmisc+ed",
+				"./massage_s.lua",
 				assembly,
 			},
 			outleaves = { n..".s" },
 			commands = {
-				"%{ins[2]} -s %{ins[3]} <%{ins[1]} >%{outs}"
+				"$LUA %{ins[1]} <%{ins[2]} >%{outs}"
 			}
 		}
 	end
diff --git a/mach/proto/fp/massage_s.lua b/mach/proto/fp/massage_s.lua
new file mode 100644
index 000000000..1dd8d19c4
--- /dev/null
+++ b/mach/proto/fp/massage_s.lua
@@ -0,0 +1,47 @@
+local syms = {
+	"_adf4",
+	"_adf8",
+	"_cff4",
+	"_cff8",
+	"_cfi",
+	"_cfu",
+	"_cif4",
+	"_cif8",
+	"_cmf4",
+	"_cmf8",
+	"_cuf4",
+	"_cuf8",
+	"_dvf4",
+	"_dvf8",
+	"_fef4",
+	"_fef8",
+	"_fif4",
+	"_fif8",
+	"_mlf4",
+	"_mlf8",
+	"_ngf4",
+	"_ngf8",
+	"_sbf4",
+	"_sbf8",
+	"_zrf4",
+	"_zrf8",
+	"_add_ext",
+	"_div_ext",
+	"_mul_ext",
+	"_nrm_ext",
+	"_sft_ext",
+	"_sub_ext",
+	"_zrf_ext",
+	"_compact",
+	"_extend",
+	"_b64_add",
+	"_b64_sft",
+	"_b64_rsft",
+	"_b64_lsft",
+}
+
+local data = io.stdin:read("*a")
+for _, s in ipairs(syms) do
+    data = data:gsub(s, (s:gsub("^_", ".")))
+end
+io.stdout:write(data)