diff --git a/.scripts/powershell.ps1 b/.scripts/powershell.ps1
index ac706ba..9fce37a 100644
--- a/.scripts/powershell.ps1
+++ b/.scripts/powershell.ps1
@@ -42,9 +42,6 @@ try {
   }
   Write-Output "Downloading moonbit ..."
   Invoke-WebRequest -Uri $MoonbitUri -OutFile "${HOME}\moonbit.zip"
-  if (Test-Path -Path "$MoonHome\bin" -PathType Container) {
-    Remove-Item -Force -Recurse "$MoonHome\bin"
-  }
   if (Test-Path -Path "$MoonHome\lib" -PathType Container) {
     Remove-Item -Force -Recurse "$MoonHome\lib"
   }
@@ -100,4 +97,4 @@ else {
 
 Write-Output "To verify the download binaries, check https://www.moonbitlang.com/download#verifying-binaries for instructions."
 
-Write-Output "To know how to add shell completions, run 'moon shell-completion --help'"
\ No newline at end of file
+Write-Output "To know how to add shell completions, run 'moon shell-completion --help'"
diff --git a/.scripts/unix.sh b/.scripts/unix.sh
index 43bc828..bda83a2 100644
--- a/.scripts/unix.sh
+++ b/.scripts/unix.sh
@@ -126,9 +126,6 @@ echo "Downloading moonbit ..."
 curl --fail --location --progress-bar --output "$moonbit_dest" "$moonbit_uri" ||
   error "Failed to download moonbit from \"$moonbit_uri\""
 
-rm -rf "${moon_home:?}/bin" ||
-  error "Failed to remove existing moonbit binaries"
-
 rm -rf "${moon_home:?}/lib" ||
   error "Failed to remove existing moonbit libraries"
 
@@ -174,15 +171,15 @@ rm -f "$core_dest" ||
 
 echo "Bundling core ..."
 
-PATH=$bin_dir $exe bundle --warn-list -a --all --source-dir "$lib_dir"/core ||
+PATH=$bin_dir $exe -C "$lib_dir"/core bundle --warn-list -a --all ||
   error "Failed to bundle core"
 
 if [[ $version == "nightly" ]]; then
-  PATH=$bin_dir $exe bundle --warn-list -a --target llvm --source-dir "$lib_dir"/core ||
+  PATH=$bin_dir $exe -C "$lib_dir"/core bundle --warn-list -a --target llvm ||
     error "Failed to bundle core for llvm backend"
 fi
 
-PATH=$bin_dir $exe bundle --warn-list -a --target wasm-gc --source-dir "$lib_dir"/core --quiet ||
+PATH=$bin_dir $exe -C "$lib_dir"/core bundle --warn-list -a --target wasm-gc --quiet ||
   error "Failed to bundle core to wasm-gc"
 
 tildify() {