Try "vcpkg integrate install"

wgledbetter · wgledbetter · commit 45ae717e667b · 2021-01-06T17:17:23.000-06:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -121,6 +121,7 @@ install:
   - git submodule update --init tools/boostdep
   - python tools/boostdep/depinst/depinst.py math
   - vcpkg install eigen3
+  - vcpkg integrate install
   - bootstrap
   - b2 headers
 
