diff --git a/build.lua b/build.lua
index c95e3acf3..1ecf0eb12 100644
--- a/build.lua
+++ b/build.lua
@@ -45,7 +45,9 @@ installable {
 		"util/ack+pkg",
 		"util/amisc+pkg",
 		"util/arch+pkg",
+		"util/ass+pkg",
 		"util/ego+pkg",
+		"util/ass+pkg",
 		"util/led+pkg",
 		"util/misc+pkg",
 		"util/opt+pkg",
diff --git a/util/ass/ass00.h b/util/ass/ass00.h
index 6da8fb173..7b31d89ff 100644
--- a/util/ass/ass00.h
+++ b/util/ass/ass00.h
@@ -2,7 +2,12 @@
  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
+#include <stdlib.h>
 #include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <em_spec.h>
 #include <as_spec.h>
 #include <em_flag.h>
diff --git a/util/ass/assci.c b/util/ass/assci.c
index d3d0b9692..3b9761eac 100644
--- a/util/ass/assci.c
+++ b/util/ass/assci.c
@@ -850,7 +850,7 @@ extxcon(header) {
 }
 
 /* Added atol() that ignores overflow. --Ceriel */
-long atol(s)
+long myatol(s)
     register char *s;
 {
     register long total = 0;
@@ -879,6 +879,6 @@ extvcon(header) {
 	if ( consiz>4 ) {
 		error("Size of initializer exceeds loader capability") ;
 	}
-	extarb((int)consiz,atol(string)) ;
+	extarb((int)consiz,myatol(string)) ;
 	return ;
 }
diff --git a/util/ass/asscm.c b/util/ass/asscm.c
index eb9f853bf..e2b72e953 100644
--- a/util/ass/asscm.c
+++ b/util/ass/asscm.c
@@ -47,7 +47,6 @@ area_t getarea(size) unsigned size ; {
 	register struct freeblock *c_ptr,*l_ptr ;
 	register char *ptr ;
 	unsigned rqsize ;
-	char *malloc() ;
 
 	size = ((size + (sizeof(int) - 1)) / sizeof(int)) * sizeof(int);
 #ifdef MEMUSE
diff --git a/util/ass/assex.h b/util/ass/assex.h
index f28c6f582..86359ba11 100644
--- a/util/ass/assex.h
+++ b/util/ass/assex.h
@@ -150,16 +150,3 @@ extern  relc_t  *text_reloc();
 extern  relc_t  *data_reloc();
 extern  area_t  getarea();
 
-/*
- * all used library routines
- */
-extern  char    *malloc();
-extern  int     open();
-extern  int     creat();
-extern  int     getpid();
-extern  int     unlink();
-extern  int     close();
-extern  int     strcmp();
-extern  char    *strcpy();
-
-#define void    int
diff --git a/util/ass/build.lua b/util/ass/build.lua
new file mode 100644
index 000000000..77e12141c
--- /dev/null
+++ b/util/ass/build.lua
@@ -0,0 +1,51 @@
+cprogram {
+	name = "maktab",
+	srcs = {
+		"./maktab.c"
+	},
+	deps = {
+		"h+emheaders",
+		"modules/src/em_data+lib",
+	}
+}
+
+normalrule {
+	name = "asstb",
+	ins = {
+		"+maktab",
+		"etc/ip_spec.t"
+	},
+	outleaves = {
+		"asstb.c"
+	},
+	commands = {
+		"%{ins} %{outs}"
+	}
+}
+
+cprogram {
+	name = "em_ass",
+	srcs = {
+		"./ass*.c",
+		"+asstb",
+	},
+	deps = {
+		"h+emheaders",
+		"h+local",
+		--"modules/src/alloc+lib",
+		"modules/src/em_data+lib",
+		--"modules/src/data+lib",
+		--"modules/src/object+lib",
+		--"modules/src/system+lib",
+		"./ass*.h",
+	}
+}
+
+installable {
+	name = "pkg",
+	map = {
+		["$(PLATDEP)/em_ass"] = "+em_ass",
+		["$(INSDIR)/share/man/man6/em_ass.6"] = "./em_ass.6",
+	}
+}
+
diff --git a/util/ass/em_ass.6 b/util/ass/em_ass.6
index cb2eb21c3..3f8cdb279 100644
--- a/util/ass/em_ass.6
+++ b/util/ass/em_ass.6
@@ -4,7 +4,7 @@
 .SH NAME
 em_ass \- EM assembler/loader
 .SH SYNOPSIS
-.B ~em/lib.bin/em_ass
+.B ~em/lib/ack/em_ass
 [options] argument ...
 .SH DESCRIPTION
 Em_ass assembles and links EM modules.