version: 2.39.{build}

image: Visual Studio 2015

build:
  project: graphviz.sln
  verbosity: detailed

before_build:
  - ps: cp windows/config.h config.h
  - ps: C:\MinGW\bin\mingw-get install mingw-w64-gtk2
  - ps: set PATH=%PATH%;C:\MinGW\mingw

version: 2.39.{build}

image: Visual Studio 2015

build:
  project: graphviz.sln
  verbosity: detailed

before_build:
  # Install GTK
  - ps: C:\cygwin\setup-x86.exe -qnNdO -R C:/%cygwin% -s http://cygwin.mirror.constant.com -l C:/%cygwin%/var/cache/setup -P libgtk2.0 libgtk2.0-devel
  - ps: set PATH=%PATH%;C:\cygwin\bin
  - ps: cp windows/config.h config.h

Use cygwin to install GTK
Use cygwin to install GTK