build error in /usr/pkgsrc/meta-pkgs/modular-xorg

[Bob Bernstein <poobah%ruptured-duck.com@localhost>]

I cd'd into the subdir noted above and entered "bmake." Here is the 
bad news from pkgsrc:

--snip---
Package dependency requirement 'randrproto >= 1.6.0' could not be 
satisfied.
Package 'randrproto' has version '1.5.0', required version is '>= 
1.6.0'

 Consider adjusting the PKG_CONFIG_PATH environment variable if you
 installed software in a non-standard prefix.

  Alternatively, you may set the environment variables 
  XSERVERCFLAGS_CFLAGS
  and XSERVERCFLAGS_LIBS to avoid the need to call pkg-config.
  See the pkg-config man page for more details.
  *** Error code 1

   Stop.
   bmake[2]: stopped in /usr/pkgsrc/x11/modular-xorg-server
   *** Error code 1
--snip--

I do not know what to do at this point. If I knew what values to 
asign to those two suggested env vars I'd be ok shape, I think.

-- 
In our age there is no such thing as 'keeping out of 
politics'. All issues are political issues, and 
politics itself is a mass of lies, evasions, folly, 
hatred, and schizophrenia.

  George Orwell "Politics and the English Language" (1946)