diff --git a/src/bin/buildForWindows.sh b/src/bin/buildForWindows.sh
index 81ef2dd53..d9a4d9468 100755
--- a/src/bin/buildForWindows.sh
+++ b/src/bin/buildForWindows.sh
@@ -28,8 +28,9 @@ TMP_FOLDER=$(try mktemp -d) || exit 1
 trap 'exit 1' HUP INT TERM
 trap 'log "cleaning up..."; try cd / && try rm -rf "${TMP_FOLDER}"' EXIT
 
+rm bin tests node_modules/ep_etherpad-lite
 log "create a clean environment in $TMP_FOLDER..."
-try git archive --format=tar HEAD | (try cd "${TMP_FOLDER}" && ls -lisa && try tar xf -) \
+try git archive --format=tar HEAD | (try cd "${TMP_FOLDER}" && try tar xf -) \
     || fatal "failed to copy etherpad to temporary folder"
 try mkdir "${TMP_FOLDER}"/.git
 try git rev-parse HEAD >${TMP_FOLDER}/.git/HEAD