dll in PATH

.appveyor.yml

@@ -11,7 +11,7 @@ environment:
 install:
   - curl -sSf -o rustup-init.exe https://win.rustup.rs/
   - rustup-init.exe -y --default-host %TARGET%
-  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin;C:\Tools\vcpkg\installed\x64-windows\bin
 
   - rustc -vV
   - cargo -vV
@@ -22,8 +22,6 @@ install:
   - vcpkg install openssl:x64-windows
   - vcpkg install mongo-c-driver:x64-windows
   - cd %APPVEYOR_BUILD_FOLDER%
-  - copy C:\Tools\vcpkg\packages\libbson_x64-windows\bin\libbson-1.0.dll .
-  - copy C:\Tools\vcpkg\packages\mongo-c-driver_x64-windows\bin\libmongoc-1.0.dll .
 
 build: false
 test_script: