pkg/52999: kicad-4.0.4nb8 won't compile on Linux

[lingvofactory%gmail.com@localhost]

>Number:         52999
>Category:       pkg
>Synopsis:       kicad-4.0.4nb8 won't compile on Linux
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 09 21:30:01 +0000 2018
>Originator:     Andrei Melnikov
>Release:        pkgsrc-2017Q4
>Organization:
>Environment:
Linux 4.10.0-33-generic #37~16.04.1-Ubuntu SMP x86_64 GNU/Linux
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.6) 
>Description:
Kicad stops compiling on pkgsrc/Linux, here's the output:

=> Returning to build of kicad-4.0.4nb8
===> Overriding tools for kicad-4.0.4nb8
===> Extracting for kicad-4.0.4nb8
===> Patching for kicad-4.0.4nb8
=> Applying pkgsrc patches for kicad-4.0.4nb8
===> Creating toolchain wrappers for kicad-4.0.4nb8
src=/media/andrei/TOSHIBA/opt/pkg/lib/pkgconfig/fixesproto.pc  dst=/media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad/work/.buildlink/lib/pkgconfig/fixesext.pc;  /bin/mkdir -p /media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad/work/.buildlink/lib/pkgconfig;  if test -f ${src}; then  /bin/ln -sf ${src} ${dst};  fi
src=/media/andrei/TOSHIBA/opt/pkg/lib/pkgconfig/compositeproto.pc  dst=/media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad/work/.buildlink/lib/pkgconfig/compositeext.pc;  /bin/mkdir -p /media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad/work/.buildlink/lib/pkgconfig;  if test -f ${src}; then  /bin/ln -sf ${src} ${dst};  fi
===> Configuring for kicad-4.0.4nb8
=> Eliminating Mac OS X build specific for kicad-4.0.4nb8
/bin/sed: -e expression #1, char 31: Invalid character class name
*** Error code 1

Stop.
bmake[1]: stopped in /media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad
*** Error code 1

Stop.
bmake: stopped in /media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad
>How-To-Repeat:
Fresh installation of pkgsrc-2017Q4.

/media/andrei/TOSHIBA/opt/pkgsrc/cad/kicad/# bmake install
>Fix: