diff --git a/Makefile b/Makefile
index d73f160..3e82ec7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # LuPI2 Makefile
 
 # Default compiler settings.
-PREFIX?=musl
+PREFIX?=x86_64-linux-musl
 
 CC = $(PREFIX)-gcc
 CFLAGS?=-O2 -std=c99
diff --git a/README.md b/README.md
index 0041c80..2d6949b 100644
--- a/README.md
+++ b/README.md
@@ -6,9 +6,9 @@ intuitive languages. It has only 6 types, very simple syntax, yet supports many
 Build
 -----
 1. Clone this repository
-2. Get musl libc (with musl-gcc wrapper), or compile musl cross compiler(like arm-linux-musleabihf)
+2. Get musl cross compiler(like arm-linux-musleabihf), simplest way is to use [musl-cross](https://github.com/GregorR/musl-cross)
 3. Get `xxd` utility (usually packaged with vim)
-4. Build dependencies using scripts/dependencies.sh script
+4. Build dependencies using scripts/dependencies.sh script for your platform(s)
 5. Execute `make build`
 6. You will need to put some OS to `root` directory where you run the binary. For now you can get plan9k at https://cloud.magik6k.net/index.php/s/7jPRAU037dzt8Ga/download
 
diff --git a/scripts/dependencies.sh b/scripts/dependencies.sh
index 7d52649..263a821 100755
--- a/scripts/dependencies.sh
+++ b/scripts/dependencies.sh
@@ -1,32 +1,39 @@
 #!/bin/bash
 #TOOL=arm-musl-linuxeabihf
-TOOL=x86_64-unknown-linux-gnu
-OPENSSL_TARGET=linux-generic32
+TOOL=x86_64-linux-musl
+OPENSSL_TARGET=linux-generic64
 OUT=$TOOL
-# TODO: more targets / host target / musl target from host
+# TODO: more targets / host target
 
 if [ $# -lt 1 ]
 then
-  echo "Usage : $0 [arm32-musl|x86_64|musl]"
+  echo "Usage : $0 [all|arm32|x86_64|i486]"
   exit
 fi
 
 case "$1" in
-  arm32-musl )
+  all )
+    TARGETS=(arm32 i486 x86_64)
+    for i in ${TARGETS[@]}; do
+      ./$0 $i
+    done
+    ;;
+  arm32 )
     TOOL=arm-linux-musleabihf
     OUT=$TOOL
     OPENSSL_TARGET=linux-generic32
     ;;
+  i486 )
+    TOOL=i486-linux-musl
+    OUT=$TOOL
+    OPENSSL_TARGET=linux-generic32
+    ;;
   x86_64 )
-    TOOL=x86_64-unknown-linux-gnu
+    TOOL=x86_64-linux-musl
     OUT=$TOOL
     OPENSSL_TARGET=linux-generic64
     ;;
-  musl )
-    TOOL=x86_64-unknown-linux-gnu
-    OUT=musl
-    OPENSSL_TARGET=linux-generic64
-    ;;
+    
   *) echo "Invalid target!" ; exit 1
     ;;
 esac
diff --git a/src/lua/core/gpio.lua b/src/lua/core/gpio.lua
index 85abc38..31f72b1 100644
--- a/src/lua/core/gpio.lua
+++ b/src/lua/core/gpio.lua
@@ -51,7 +51,7 @@ gpio.register = function ()
     checkArg(1, pin, "number")
     checkArg(2, pin, "boolean", "number", "nil")
     pin = tostring(math.floor(pin))
-    value = (value == true or value > 0) and "1" or "0"
+    value = (value == true or (type(value) == "number" and value & 1 == 1) ) and "1" or "0"
     if not fexists("/sys/class/gpio/gpio" .. pin) then
       return false, "Set pin mode first"
     end