diff --git a/Makefile b/Makefile
index 3f3061d..2b457cb 100644
--- a/Makefile
+++ b/Makefile
@@ -21,16 +21,16 @@ s48 : $(s48-targets)
 scsh : $(scsh-targets)
 
 s48-interfaces.scm : $(s48-interfaces)
-	cat $(s48-interfaces) > s48-interfaces.scm
+	cat build/header.scm $(s48-interfaces) > s48-interfaces.scm
 
 s48-packages.scm : $(s48-packages)
-	build/xpackages.scm s48-packages.scm $(s48-packages)
+	build/xpackages.scm s48-packages.scm build/header.scm $(s48-packages)
 
 interfaces.scm : $(s48-interfaces) $(scsh-interfaces)
-	cat $(s48-interfaces) $(scsh-interfaces) > interfaces.scm
+	cat build/header.scm $(s48-interfaces) $(scsh-interfaces) > interfaces.scm
 
 packages.scm : $(s48-packages) $(scsh-packages)
-	build/xpackages.scm packages.scm $(s48-packages) $(scsh-packages)
+	build/xpackages.scm packages.scm build/header.scm $(s48-packages) $(scsh-packages)
 
 .PHONY : clean
 clean :
diff --git a/build/header.scm b/build/header.scm
new file mode 100644
index 0000000..49117df
--- /dev/null
+++ b/build/header.scm
@@ -0,0 +1,3 @@
+;;; This file was automatically generated by the sunterlib
+;;; makefile, so do not edit it.
+
diff --git a/build/xpackages.scm b/build/xpackages.scm
index 3f70fc3..4ecdd8a 100755
--- a/build/xpackages.scm
+++ b/build/xpackages.scm
@@ -30,10 +30,17 @@ exec scsh -o filenames -o pp -s "$0" "$@"
 ;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 ;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-(define header-message
-  ";; This file was automatically generated by the sunterlib
-;; makefile, so do not edit it.
-")
+(define copy-header
+  (lambda (header)
+    (with-current-input-port
+     (open-input-file header)
+     (let loop ()
+       (let ((ch (read-char)))
+         (if (eof-object? ch)
+             (values)
+             (begin
+               (write-char ch)
+               (loop))))))))
 
 (define process-source
   (lambda (source)
@@ -81,14 +88,14 @@ exec scsh -o filenames -o pp -s "$0" "$@"
                 (error "unexpected form in packages" source form))))))))
 
 (define xpackages
-  ;; Copy each source file to the target file, adding the source
-  ;; directory to each package's file-specs.
-  (lambda (target sources)
+  ;; Copy the header and each source file to the target file, adding
+  ;; the source directory to each package's file-specs.
+  (lambda (target header sources)
     (with-current-output-port
      (open-output-file target)
-     (display header-message)
-     (newline)
+     (copy-header header)
      (for-each process-source sources))))
 
 (xpackages (car command-line-arguments)
-           (cdr command-line-arguments))
+           (cadr command-line-arguments)
+           (cddr command-line-arguments))