Update build.sh

Co-authored-by: Jakub Novák <jakub@e2b.dev>

Author: tomassrnka

build.sh

@@ -42,12 +42,10 @@ function build_version {
   git checkout "$(get_tag "$version")"
 
   # Set up cross-compilation if building arm64 on x86_64
-  local make_opts=""
+  local make_opts="ARCH=arm64"
   if [[ "$TARGET_ARCH" == "arm64" ]]; then
     if [[ "$HOST_ARCH" != "aarch64" ]]; then
       make_opts="ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-"
-    else
-      make_opts="ARCH=arm64"
     fi
   fi