Index: gap-radiroot-2.8/doc/make_doc
===================================================================
--- gap-radiroot-2.8.orig/doc/make_doc
+++ gap-radiroot-2.8/doc/make_doc
@@ -8,24 +8,28 @@
 ##  etc/convert.pl) documentation for the Radiroot Package.
 ##
 
+export GAP_CONVERT_DATE="April 2014"
+TEXARG="\\def\\GAPDATE{$GAP_CONVERT_DATE}\input"
+
 echo "TeXing documentation"
 # TeX the manual
-tex manual
+echo tex $TEXARG manual
+tex $TEXARG manual
 # ... and build its bibliography (uncomment if there is no `manual.bib')
 bibtex manual
 # TeX the manual again to incorporate the ToC ... and build the index
-tex manual; /usr/share/gap/etc/manualindex manual
+tex $TEXARG manual; /usr/share/gap/etc/manualindex manual
 # Finally TeX the manual again to get cross-references right
-tex manual
+tex $TEXARG manual
 # Create the PostScript version (uncomment next line, if needed)
 #dvips -D300 manual -o
 # Create PDF version
-pdftex manual; pdftex manual 
+pdftex $TEXARG manual; pdftex $TEXARG manual
 
 # The HTML version of the manual
 mkdir -p ../htm
 echo "Creating HTML documentation"
-GAP_CONVERT_DATE="April 2018" /usr/share/gap/etc/convert.pl -t -c -u -n Radiroot . ../htm
+/usr/share/gap/etc/convert.pl -t -c -u -n Radiroot . ../htm
 
 #############################################################################
 ##
Index: gap-radiroot-2.8/doc/manual.tex
===================================================================
--- gap-radiroot-2.8.orig/doc/manual.tex
+++ gap-radiroot-2.8/doc/manual.tex
@@ -41,7 +41,7 @@
   \centerline{\secfont by}\vfill
   \centerline{\secfont Andreas Distler}\bigskip
   \centerline{\tt a.distler@tu-bs.de}\vfill
-  \centerline{\secfont{April} 2014}
+  \centerline{\secfont \GAPDATE}
 }
 %
 %
