Error using \usepackage{color} and supp-pdf together

Hi all.

The following test.tex file:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\input eplain.tex
\beginpackages
  \usepackage{color}
\endpackages

\input supp-pdf

hello

\end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

produces the following error:

$ pdftex test
This is pdfTeX, Version 3.14159265-2.6-1.40.15 (TeX Live 2015/dev/Debian) (preloaded format=pdftex)
 restricted \write18 enabled.
entering extended mode
(./test.tex (/home/rodolfo/Downloads/eplain-3.7/tex/eplain/eplain.tex)
(/usr/share/texlive/texmf-dist/tex/plain/graphics-pln/miniltx.tex)
(/usr/share/texlive/texmf-dist/tex/latex/graphics/color.sty
(/usr/share/texlive/texmf-dist/tex/latex/latexconfig/color.cfg)
(/usr/share/texlive/texmf-dist/tex/latex/pdftex-def/pdftex.def
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/infwarerr.sty)
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/ltxcmds.sty)))
(/usr/share/texlive/texmf-dist/tex/context/base/supp-pdf.mkii
[Loading MPS to PDF converter (version 2006.09.02).]
) (/usr/share/texmf/tex/context/base/supp-pdf.tex
(/usr/share/texlive/texmf-dist/tex/context/base/supp-pdf.mkii
[Loading MPS to PDF converter (version 2006.09.02).]
! Incomplete \ifx; all text was ignored after line 2023.
<inserted text> 
                \fi 
<to be read again> 
                   \newcount 
l.2023 ...\makeMPintoPDFobject\undefined \newcount
                                                  \makeMPintoPDFobject \fi
? 



Please help.

Thanks in advance,

Rodolfo