Maybe this helps?
    
    https://github.com/actions/virtual-environments/issues/195
    
    On 06/03/20 08:07, Dario Lombardo
      wrote:
    
    
      
      Are you saying "set v"? It doesn't print anything.
        
The installation of VS is pre-made by the github builder
          itself, not by me, hence I don't have any control over the
          installation options. However I guess every component is in
          place, and maybe I just need to add the proper dir to the
          PATH. What do you think?
       
      
      
        
        On
          3/5/20 7:27 AM, Dario Lombardo wrote:
          > Hi,
          > I'm getting this output from a windows build
          > 
          > -- Using VCINSTALLDIR: VCINSTALLDIR-NOTFOUND
          > -- Using
          MERGE_MODULE_DIR-NOTFOUND\Microsoft_VC142_CRT_x64.msm for the
          WiX installer
          > -- Configuring done
          > -- Generating done
          > -- Build files have been written to:
          D:/a/wireshark/wireshark/build
          > 
          > What's going wrong? The rest of the output looks good.
          
          VCINSTALLDIR should have been set by Visual Studio, e.g. by
          vcvarsall.bat. What does `set v` show?
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