diff --git a/.appveyor.yml b/.appveyor.yml
index 118a9827..fa44a878 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -35,11 +35,13 @@ build_script:
   # don't make the build error after Appveyor updates the compiler.
   - cmd: >
       echo %NUMBER_OF_PROCESSORS%
+
       set CMAKE_BUILD_PARALLEL_LEVEL=%NUMBER_OF_PROCESSORS%
 
       cmake --version
 
       set CFLAGS=/Wv:19.29.30037
+
       set CXXFLAGS=/Wv:19.29.30037
 
       cmake