building ocaml with sbuild

[Abhijith PA <abhijith@disroot.org>]

Hello.

I was trying to build ocaml with sbuild.

 - dget http://http.debian.net/debian/pool/main/o/ocaml/ocaml_4.05.0-10.dsc

 - cd ocaml-4.05.0/
 - sbuild -sA --dist=unstable

And I ended up following error.

`````
sbuild -sA --dist=unstable
dh clean
   debian/rules override_dh_auto_clean
make[1]: Entering directory '/root/ocaml-3.12.1/test/ocaml-4.05.0'
/usr/bin/make -f
/root/ocaml-3.12.1/test/ocaml-4.05.0/debian/ocamlinit.mk ocamlinit-clean
make[2]: Entering directory '/root/ocaml-3.12.1/test/ocaml-4.05.0'
/root/ocaml-3.12.1/test/ocaml-4.05.0/debian/ocamlinit.mk:28:
/usr/share/ocaml/ocamlvars.mk: No such file or directory
make[2]: *** No rule to make target '/usr/share/ocaml/ocamlvars.mk'.  Stop.
make[2]: Leaving directory '/root/ocaml-3.12.1/test/ocaml-4.05.0'
make[1]: *** [debian/rules:171: override_dh_auto_clean] Error 2
make[1]: Leaving directory '/root/ocaml-3.12.1/test/ocaml-4.05.0'
make: *** [debian/rules:75: clean] Error 2
E: Failed to clean source directory /root/ocaml-3.12.1/test/ocaml-4.05.0
(/root/ocaml-3.12.1/test/ocaml_4.05.0-10.dsc)

``````

What I did wrong ? Please help.