diff --git a/lib/6500/descr b/lib/6500/descr
index 41738ccd4..1e50c6ee5 100644
--- a/lib/6500/descr
+++ b/lib/6500/descr
@@ -8,7 +8,7 @@ var NAME=m6500
 var M=6500
 var LIB=mach/6500/lib/tail_
 var RT=mach/6500/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/6809/descr b/lib/6809/descr
index c08ac85a6..683a21ec5 100644
--- a/lib/6809/descr
+++ b/lib/6809/descr
@@ -9,7 +9,7 @@ var NAME=m6809
 var M=6809
 var LIB=mach/6809/lib/tail_
 var RT=mach/6809/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/descr/cpm b/lib/descr/cpm
index 262b12446..afa4cc9d8 100644
--- a/lib/descr/cpm
+++ b/lib/descr/cpm
@@ -9,7 +9,7 @@ var NAME=CPM
 var LIB=mach/z80/int/lib/tail_
 var RT=mach/z80/int/lib/head_
 var SIZE_F=-sm
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name asld
 	from .k.m.a
 	to e.out
diff --git a/lib/descr/fe.src b/lib/descr/fe.src
index 288d5219a..a72a363c5 100644
--- a/lib/descr/fe.src
+++ b/lib/descr/fe.src
@@ -2,7 +2,7 @@
 name cpp
 	# no from, it's governed by the P property
 	to .i
-	program {EM}/lib/cpp
+	program {EM}/lib/cpp.new
 	mapflag -I* CPP_F={CPP_F?} -I*
 	mapflag -U* CPP_F={CPP_F?} -U*
 	mapflag -D* CPP_F={CPP_F?} -D*
diff --git a/lib/descr/nascom b/lib/descr/nascom
index c9a560a6c..117911d74 100644
--- a/lib/descr/nascom
+++ b/lib/descr/nascom
@@ -8,7 +8,7 @@ var NAME=nascom
 var M=z80a
 var LIB=mach/z80a/lib/tail_
 var RT=mach/z80a/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/em22/descr b/lib/em22/descr
index 6d897fb15..dd468fbad 100644
--- a/lib/em22/descr
+++ b/lib/em22/descr
@@ -9,7 +9,7 @@ var NAME=int22
 var LIB=mach/int/lib/tail_
 var RT=mach/int/lib/head_
 var SIZE_FLAG=-sm
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name asld
 	from .k.m.a
 	to e.out
diff --git a/lib/i80/descr b/lib/i80/descr
index 2b31a593e..3c0ea4929 100644
--- a/lib/i80/descr
+++ b/lib/i80/descr
@@ -8,7 +8,7 @@ var NAME=i8080
 var M=8080
 var LIB=mach/8080/lib/tail_
 var RT=mach/8080/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/i86/descr b/lib/i86/descr
index 7135e9f71..4bea559d5 100644
--- a/lib/i86/descr
+++ b/lib/i86/descr
@@ -8,7 +8,7 @@ var NAME=i8086
 var M=i86
 var LIB=mach/i86/lib/tail_
 var RT=mach/i86/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/m68k2/descr b/lib/m68k2/descr
index 7cd66069e..bafd025e7 100644
--- a/lib/m68k2/descr
+++ b/lib/m68k2/descr
@@ -8,7 +8,7 @@ var NAME=m68k2
 var M=m68k2
 var LIB=mach/m68k2/lib/tail_
 var RT=mach/m68k2/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/m68k4/descr b/lib/m68k4/descr
index 16f1f4904..db0b1c0dd 100644
--- a/lib/m68k4/descr
+++ b/lib/m68k4/descr
@@ -9,7 +9,7 @@ var M=m68k4
 var LIBDIR=mach/m68k4/lib
 var LIB=mach/m68k4/lib/tail_
 var RT=mach/m68k4/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/pdp/descr b/lib/pdp/descr
index 3a90a8b9d..eb99a54a0 100644
--- a/lib/pdp/descr
+++ b/lib/pdp/descr
@@ -8,7 +8,7 @@ var M=pdp
 var NAME=pdp
 var LIB=mach/pdp/lib/tail_
 var RT=mach/pdp/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/vax4/descr.src b/lib/vax4/descr.src
index f9c1e5e3a..f69102297 100644
--- a/lib/vax4/descr.src
+++ b/lib/vax4/descr.src
@@ -8,7 +8,7 @@ var M=vax4
 var NAME=vax4
 var LIB=mach/vax4/lib/tail_
 var RT=mach/vax4/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s
diff --git a/lib/z80/descr b/lib/z80/descr
index f201f983b..69006456b 100644
--- a/lib/z80/descr
+++ b/lib/z80/descr
@@ -8,7 +8,7 @@ var NAME=z80
 var M=z80
 var LIB=mach/z80/lib/tail_
 var RT=mach/z80/lib/head_
-var INCLUDES=-I{EM}/include
+var INCLUDES=-I{EM}/include -I/usr/include
 name be
 	from .m
 	to .s