MSbuild doesn't expand environment variables -

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i'm using msbuild build solution file command line. in it, path vcxproj file specified environment variable foo %foo%\projname.vcxproj

when open sln in ide, project found , loaded. when use msbuild command line (on same machine) error of: 

the project file "c:\blah\blah\%foo%\projname.vcxproj" not found,

in same command prompt 

echo %foo%

gives me correctly expanded path.

from comments; known bug , wontfix ms. ended writing batch file copy sln file , expand environment variables, build that, , delete new sln. works fine.


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