Index: appveyor.yml
===================================================================
diff -u -N -r90c8d70e7b9eee586c4d8d2059366607db98e828 -r0a5870216df8fcfdf74cd4ba0d65b04f88201fa0
--- appveyor.yml	(.../appveyor.yml)	(revision 90c8d70e7b9eee586c4d8d2059366607db98e828)
+++ appveyor.yml	(.../appveyor.yml)	(revision 0a5870216df8fcfdf74cd4ba0d65b04f88201fa0)
@@ -36,7 +36,7 @@
 install:
   # - if not exist "%MINGW_ARCHIVE%" appveyor DownloadFile "%MINGW_URL%" -FileName "%MINGW_ARCHIVE%"
   # - 7z x -y "%MINGW_ARCHIVE%" > nul
-  - appveyor DownloadFile "%TCLKIT_URL%" -FileName "%TCLKIT%"
+  - if not exist "%TCLKIT%" appveyor DownloadFile "%TCLKIT_URL%" -FileName "%TCLKIT%"
 
 build_script:
   - if "%TOOLCHAIN%" == "autoconf-tea" set CHERE_INVOKING=1
@@ -48,4 +48,7 @@
   - tclkit.exe apps/build.tcl %CD% %APPVEYOR_BUILD_FOLDER% %TCLTAG% %TOOLCHAIN%
 
 on_failure:
-  - if "%TOOLCHAIN%" == "autoconf-tea" cat tcl\win\config.log
\ No newline at end of file
+  - if "%TOOLCHAIN%" == "autoconf-tea" cat tcl\win\config.log
+
+cache:
+  - "%TCLKIT%" -> appveyor.yml
\ No newline at end of file