diff --git a/.gitignore b/.gitignore
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--- a/.gitignore
+++ b/.gitignore
@@ -67,6 +67,7 @@ dkms.conf
 
 ## CMake
 
+build/
 CMakeLists.txt.user
 CMakeCache.txt
 CMakeFiles
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diff --git a/cpp/vehicle-purchase/build/vehicle-purchase b/cpp/vehicle-purchase/build/vehicle-purchase
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