gtk2hs 0.10.1 FTB with ghc 6.10.4

[gale@…]

On Tiger, just after upgrade to ghc 6.10.4, forced recompile of all active hs-* ports, and port clean --all gtk2hs:

<blah, blah...>
./tools/c2hs/c2hsLocal +RTS -RTS -C-I/opt/local/include/glib-2.0 -C-I/opt/local/lib/glib-2.0/include -C-I/opt/local/include --cppopts='-include "gtk2hs-config.h"' --precomp=glib/glib.precomp glib-object.h
c2hsLocal: does not exist
make[2]: *** [cairo/cairo.precomp] Error 1
make[2]: *** Deleting file `cairo/cairo.precomp'

<no location info>:
    can't find file: cairo/Graphics/Rendering/Cairo/Matrix.hs
make[1]: *** [cairo/libHScairo_a.p_deps] Error 1
make[1]: *** Deleting file `cairo/libHScairo_a.p_deps'
make[1]: *** Waiting for unfinished jobs....
<blah, blah...>
./tools/c2hs/c2hsLocal +RTS -RTS -iglib:cairo --precomp=cairo/cairo.precomp -o cairo/Graphics/Rendering/Cairo/Matrix.hs cairo/Graphics/Rendering/Cairo/Matrix.chs
c2hsLocal: does not exist
make[2]: *** [cairo/Graphics/Rendering/Cairo/Matrix.hs] Error 1
make[2]: *** Waiting for unfinished jobs....

<no location info>:
    can't find file: gtkglext/Graphics/UI/Gtk/OpenGL/Config.hs
make[1]: *** [gtkglext/libHSgtkglext_a.p_deps] Error 1
make[1]: *** Deleting file `gtkglext/libHSgtkglext_a.p_deps'
make: *** [all] Error 2

Error: Unable to upgrade port: 1

In case anyone is interested, I will attach the entire error output.

[nox@…]

The problem disappears if you disable parallel building

[jmr@…]

Parallel build disabled as per comment:2 in r73870.