For "make doc": -enable-gtk2, but "lablgtk" is used

Hello,

my main goal was, to get the documentation as pdf.

So I tried the target "doc" with "make doc", to see what happens.

The process failed with a message, that "lablgtk" is unknown.
I tried with "-enable-gtk2" (after using a fresh source dir to be sure  
about this problem).

But "lablgtk" is used anyway for the "make doc" and the stuff fails again.



Here is the output from "make doc":


=================================================================================================
ocamlnet-4.0.4> make doc
for pkg in src/*/.; do \
     test ! -f $pkg/Makefile -o -f $pkg/doc-ignore || \
         { ( cd $pkg && make -f Makefile.pre generate ) || exit; \
           ( cd $pkg && make -f Makefile.pre depend ) || exit; \
           ( cd $pkg && make ocamldoc.dump ) || exit; \
         }; \
done
make[1]: Entering directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
make[2]: Entering directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
sed -e 's/@VERSION@/4.0.4/' \
     -e 's/@AUTHDHREQS@//' \
     -e 's/@PREFERRED_CGI_PKG@//' \
     -e 's/@REGEXP_PROVIDER@/str/' \
     -e 's/@COMPAT_PCRE_PROVIDER@//' \
             -e 's/@ZIP_PROVIDER@//' \
         META.in >META
make[2]: Leaving directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
make[1]: Leaving directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
make[1]: Entering directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
make[1]: Leaving directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
make[1]: Entering directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
ocamlfind ocamlc -g  -I ../../src/equeue -I ../../src/netsys -package  
"unix lablgtk" -pp "../../tools/cppo-0.9.4/cppo -D GTK1" -w -3-25 -c   
uq_gtk_helper.ml
ocamlfind: Package `lablgtk' not found
../../Makefile.rules:117: recipe for target 'uq_gtk_helper.cmo' failed
make[1]: *** [uq_gtk_helper.cmo] Error 2
make[1]: Leaving directory  
'/home/oliver/AUR4/ocamlnet/src/ocamlnet-4.0.4/src/equeue-gtk1'
Makefile:40: recipe for target 'doc' failed
make: *** [doc] Error 2
ocamlnet-4.0.4>
=================================================================================================

Any ideas on that?

Ciao,
    Oliver


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