diff --git a/Build.md b/Build.md
index 832f7cc..259cbc4 100644
--- a/Build.md
+++ b/Build.md
@@ -83,7 +83,7 @@ The Windows archive on releases.llvm.org does not contain library headers, since
 For 2, one possible way is use MSYS2, in MSYS2 MinGW 64-bit shell:
 
 ```
-pacman -S mingw-w64-x86_64-clang mingw-w64-x86_64-jq mingw-w64-x86_64-ninja mingw-w64-x86_64-ncurses
+pacman -S mingw-w64-x86_64-clang mingw-w64-x86_64-cmake mingw-w64-x86_64-jq mingw-w64-x86_64-ninja mingw-w64-x86_64-ncurses
 mkdir build
 cd build
 cmake .. -G Ninja  -DSYSTEM_CLANG=ON -DCMAKE_CXX_FLAGS=-D__STDC_FORMAT_MACROS