appveyor.yml in hoc-0.7 vs appveyor.yml in hoc-0.7.1

@@ -6,13 +6,15 @@
     - master
   except:
     - gh-pages
 os: Windows Server 2012
 install:
-  - cmd: SET PATH=C:\Ruby200\bin;%PATH%
+  - cmd: SET PATH=C:\Ruby200\bin;C:\msys64\usr\bin;%PATH%
+  - cmd: bash --login -c "pacman -S --needed --noconfirm base-devel"
   - cmd: ruby --version
   - cmd: svn --version
   - cmd: git --version
+  - cmd: diffstat --version
 build_script:
   - bundle update
   - bundle install
 test_script:
   - rake