Index: appveyor.yml
===================================================================
diff -u -N -r7705361024980a3707594af6e7af46a57c2df3d8 -r8d4ac5241d87c43b4225d48eeef7684cc33df816
--- appveyor.yml	(.../appveyor.yml)	(revision 7705361024980a3707594af6e7af46a57c2df3d8)
+++ appveyor.yml	(.../appveyor.yml)	(revision 8d4ac5241d87c43b4225d48eeef7684cc33df816)
@@ -68,7 +68,7 @@
   - if "%TOOLCHAIN%" == "autoconf-tea" set HOME=C:\Users\appveyor
   # - if "%TOOLCHAIN%" == "autoconf-tea" bash -lc "cd && echo \"export PATH=/c/projects/nsf-2ylk0/mingw64/bin:/c/msys64/usr/bin:\$PATH; \" >> .profile"
   - if "%TOOLCHAIN%" == "autoconf-tea" bash -lc "cd && echo \"export PATH=/c/projects/nsf-2ylk0/mingw64/bin:\$PATH; export MSYSTEM=MINGW64; export MINGW_PREFIX=/c; alias make='/c/msys64/usr/bin/make'; shopt -s expand_aliases; \" >> .profile"
-  - if "%TOOLCHAIN%" == "nmake-tea" call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
+  - if "%TOOLCHAIN%" == "nmake-tea" call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
   - if "%TOOLCHAIN%" == "autoconf-tea" bash -lc "sh --version"
   - if "%TOOLCHAIN%" == "autoconf-tea" bash -lc "make --version"
   - tclkit.exe apps/build.tcl %CD% %APPVEYOR_BUILD_FOLDER% %TCLTAG% %TOOLCHAIN%