diff --git a/build.sh b/build.sh
index 6a915df..c727fa6 100755
--- a/build.sh
+++ b/build.sh
@@ -1,9 +1,10 @@
 #/bash/sh
 export VERSION=0.26.5
 
-sudo apt-get install gcc-mingw-w64-i686
+sudo apt-get install gcc-mingw-w64-i686 gcc-multilib
 env GOOS=windows GOARCH=386 CGO_ENABLED=1 CC=i686-w64-mingw32-gcc go build -ldflags "-s -w -extldflags -static -extldflags -static" -buildmode=c-shared -o npc_sdk.dll cmd/npc/sdk.go
-tar -czvf npc_sdk.tar.gz npc_sdk.dll npc_sdk.h
+env GOOS=linux GOARCH=386 CGO_ENABLED=1 CC=gcc go build -ldflags "-s -w -extldflags -static -extldflags -static" -buildmode=c-shared -o npc_sdk.so cmd/npc/sdk.go
+tar -czvf npc_sdk.tar.gz npc_sdk.dll npc_sdk.so npc_sdk.h
 
 wget https://github.com/upx/upx/releases/download/v3.95/upx-3.95-amd64_linux.tar.xz
 tar -xvf upx-3.95-amd64_linux.tar.xz