fix appveyor mingw64 build
diff --git a/build/appveyor/MING-appveyor-install.bat b/build/appveyor/MING-appveyor-install.bat
index ce8fc7d..1069b05 100644
--- a/build/appveyor/MING-appveyor-install.bat
+++ b/build/appveyor/MING-appveyor-install.bat
@@ -25,13 +25,9 @@
CALL cl_setenv.bat || EXIT /B
CALL cl_showenv.bat || EXIT /B
-:: We're going to keep boost at a version cmake understands
-SET BOOSTVER=1.64.0-3
-SET BOOSTPKG=mingw-w64-%MINGWPLAT%-boost-%BOOSTVER%-any.pkg.tar.xz
-SET IGNORE=--ignore mingw-w64-x86_64-boost --ignore mingw-w64-i686-boost
-
SET PACKAGES=^
--needed -S bison flex make ^
+ mingw-w64-%MINGWPLAT%-boost ^
mingw-w64-%MINGWPLAT%-cmake ^
mingw-w64-%MINGWPLAT%-libevent ^
mingw-w64-%MINGWPLAT%-openssl ^
@@ -46,10 +42,4 @@
:: Upgrade things
%BASH% -lc "pacman --noconfirm -Syu %IGNORE%" || EXIT /B
%BASH% -lc "pacman --noconfirm -Su %IGNORE%" || EXIT /B
-%BASH% -lc "pacman --noconfirm %PACKAGES%" || EXIT /B
-
-:: Install a slightly older boost (BOOSTVER) as cmake in mingw
-:: does not have built-in dependencies for boost 1.66.0 yet
-:: -- this cuts down on build warning output --
-
-%BASH% -lc "if [[ $(pacman --query | grep '%MINGWPLAT%-boost') ^!= *"%BOOSTVER%"* ]]; then wget http://repo.msys2.org/mingw/%MINGWPLAT%/%BOOSTPKG% && pacman --noconfirm --needed -U %BOOSTPKG% && rm %BOOSTPKG%; fi" || EXIT /B
+%BASH% -lc "pacman --noconfirm %PACKAGES%" || EXIT /B
\ No newline at end of file