diff --git a/src/ci/scripts/install-msys2.sh b/src/ci/scripts/install-msys2.sh
index 185d361582505..0aa4b42a6a8fb 100755
--- a/src/ci/scripts/install-msys2.sh
+++ b/src/ci/scripts/install-msys2.sh
@@ -24,7 +24,9 @@ if isWindows; then
     # baked in which break LLVM's build system one way or another, so let's use the
     # native version which keeps everything as native as possible.
     python_home="/c/hostedtoolcache/windows/Python/${native_python_version}/x64"
-    cp "${python_home}/python.exe" "${python_home}/python3.exe"
+    if ! [[ -f "${python_home}/python3.exe" ]]; then
+        cp "${python_home}/python.exe" "${python_home}/python3.exe"
+    fi
     ciCommandAddPath "C:\\hostedtoolcache\\windows\\Python\\${native_python_version}\\x64"
     ciCommandAddPath "C:\\hostedtoolcache\\windows\\Python\\${native_python_version}\\x64\\Scripts"
 fi