diff --git a/.appveyor.yml b/.appveyor.yml
index 69b72e79..7728d195 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -41,9 +41,6 @@ skip_tags: true
 before_build:
     - set PATH=%PATH%;%TOOLSET_PATH%
     - echo "Testing %APPVEYOR_PROJECT_NAME%"
-    - dir "C:\Program Files\Microsoft Visual Studio\"
-    - dir "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars64.bat"
-    
 
     # Cloning Boost libraries (fast nondeep cloning)
     - set BOOST=C:/boost-local
@@ -61,6 +58,8 @@ build_script:
     - call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars64.bat"
     # Packages from nuget.
     - nuget install libpng-v142 -ExcludeVersion -NonInteractive
+    - dir .
+    - dir libpng\build\
     # Building Boost.
     - bootstrap.bat
     - b2.exe headers