AppVeyor Issue on Yesod

appveyor.txt

Configuring yesod-bin-1.6.0.3...
Preprocessing executable 'yesod' for yesod-bin-1.6.0.3..
Building executable 'yesod' for yesod-bin-1.6.0.3..
[1 of 7] Compiling AddHandler       ( AddHandler.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\AddHandler.o )
[2 of 7] Compiling Devel            ( Devel.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\Devel.o )
[3 of 7] Compiling HsFile           ( HsFile.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\HsFile.o )
[4 of 7] Compiling Keter            ( Keter.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\Keter.o )
C:\projects\yesod\yesod-bin\Keter.hs:36:15: warning: [-Wdeprecations]
    In the use of `decodeFile' (imported from Data.Yaml):
    Deprecated: "Please use decodeFileEither, which does not confused type-directed and runtime exceptions."
   |
36 |     mvalue <- decodeFile ketercfg
   |               ^^^^^^^^^^
[5 of 7] Compiling Options          ( Options.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\Options.o )
[6 of 7] Compiling Paths_yesod_bin  ( .stack-work\dist\010ee936\build\yesod\autogen\Paths_yesod_bin.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\Paths_yesod_bin.o )
[7 of 7] Compiling Main             ( main.hs, .stack-work\dist\010ee936\build\yesod\yesod-tmp\Main.o )
Linking .stack-work\dist\010ee936\build\yesod\yesod.exe ...
Installing executable yesod in C:\projects\yesod\.stack-work\install\811dcb7e\bin
--  End of log file: C:\projects\yesod\.stack-work\logs\yesod-bin-1.6.0.3.log