diff --git a/mach/em24/libcc/compmodule b/mach/em24/libcc/compmodule
index 671dce6d1..330b4aef5 100755
--- a/mach/em24/libcc/compmodule
+++ b/mach/em24/libcc/compmodule
@@ -1,2 +1,2 @@
-${MACH?} -Rcpp=/lib/cpp -I/usr/em/h ${MACHFL?} -LIB $1 1>&2
+${MACH?} -I../../../h ${MACHFL?} -LIB $1 1>&2
 echo `basename $1 $2`.m
diff --git a/mach/em24/libpc/compmodule b/mach/em24/libpc/compmodule
index 671dce6d1..330b4aef5 100755
--- a/mach/em24/libpc/compmodule
+++ b/mach/em24/libpc/compmodule
@@ -1,2 +1,2 @@
-${MACH?} -Rcpp=/lib/cpp -I/usr/em/h ${MACHFL?} -LIB $1 1>&2
+${MACH?} -I../../../h ${MACHFL?} -LIB $1 1>&2
 echo `basename $1 $2`.m
diff --git a/mach/em44/libcc/compmodule b/mach/em44/libcc/compmodule
index 671dce6d1..330b4aef5 100755
--- a/mach/em44/libcc/compmodule
+++ b/mach/em44/libcc/compmodule
@@ -1,2 +1,2 @@
-${MACH?} -Rcpp=/lib/cpp -I/usr/em/h ${MACHFL?} -LIB $1 1>&2
+${MACH?} -I../../../h ${MACHFL?} -LIB $1 1>&2
 echo `basename $1 $2`.m
diff --git a/mach/i86/libcc/compmodule b/mach/i86/libcc/compmodule
index eb5bd393a..2bcf66ca5 100755
--- a/mach/i86/libcc/compmodule
+++ b/mach/i86/libcc/compmodule
@@ -1,2 +1,2 @@
-${MACH?ack} -I/usr/em/h ${MACHFL?} $1 1>&2
+${MACH?ack} -I../../../h ${MACHFL?} $1 1>&2
 echo `basename $1 $2`.s
diff --git a/mach/i86/libpc/compmodule b/mach/i86/libpc/compmodule
index eb5bd393a..2bcf66ca5 100755
--- a/mach/i86/libpc/compmodule
+++ b/mach/i86/libpc/compmodule
@@ -1,2 +1,2 @@
-${MACH?ack} -I/usr/em/h ${MACHFL?} $1 1>&2
+${MACH?ack} -I../../../h ${MACHFL?} $1 1>&2
 echo `basename $1 $2`.s
diff --git a/mach/pdp/libpc/compmodule b/mach/pdp/libpc/compmodule
index 9812f89db..491f6d251 100755
--- a/mach/pdp/libpc/compmodule
+++ b/mach/pdp/libpc/compmodule
@@ -1,2 +1,2 @@
-${MACH?} -I/usr/em/h ${MACHFL?} $1 1>&2
+${MACH?} -I../../../h ${MACHFL?} $1 1>&2
 echo `basename $1 $2`.o