diff --git a/release-build.sh b/release-build.sh
index b3c29aa..39a780c 100644
--- a/release-build.sh
+++ b/release-build.sh
@@ -37,117 +37,129 @@
 
 set -e
 
+LABEL=
+if [ $# -ge 1 ]
+then
+    LABEL="-$1"
+fi
+
+TARGET=MINGW
+
+WINDIVERT32_SYS=install/$TARGET/i386/WinDivert32.sys
+if [ $# -ge 2 ]
+then
+    WINDIVERT32_SYS=$2
+fi
+
+WINDIVERT64_SYS=install/$TARGET/amd64/WinDivert64.sys
+if [ $# -ge 3 ]
+then
+    WINDIVERT64_SYS=$3
+fi
+
 VERSION=`cat ./VERSION`
 NAME=WinDivert-$VERSION
 
-for TARGET in MINGW
-do
-    if [ ! -d "install/$TARGET" ]
+echo "BUILD $NAME$LABEL"
+INSTALL=install/$NAME$LABEL
+echo "\tmake $INSTALL..."
+rm -rf $INSTALL
+mkdir -p $INSTALL
+echo "\tcopy $INSTALL/README..."
+cp README $INSTALL
+echo "\tcopy $INSTALL/CHANGELOG..."
+cp CHANGELOG $INSTALL
+echo "\tcopy $INSTALL/LICENSE..."
+cp LICENSE $INSTALL
+echo "\tcopy $INSTALL/VERSION..."
+cp VERSION $INSTALL
+echo "\tmake $INSTALL/include..."
+mkdir -p $INSTALL/include
+echo "\tcopy $INSTALL/include/windivert.h..."
+cp include/windivert.h $INSTALL/include
+echo "\tmake $INSTALL/doc..."
+mkdir -p $INSTALL/doc
+echo "\tcopy $INSTALL/doc/WinDivert.html..."
+cp doc/windivert.html $INSTALL/doc/WinDivert.html
+echo "\tmake $INSTALL/x86..."
+mkdir -p $INSTALL/x86
+echo "\tcopy $INSTALL/x86/WinDivert32.sys..."
+cp "$WINDIVERT32_SYS" $INSTALL/x86
+if ! grep "DigiCert High Assurance EV Root" $INSTALL/x86/WinDivert32.sys \
+    2>&1 >/dev/null
+then
+    echo "\t\033[33mWARNING\033[0m: unsigned WinDivert32.sys..."
+fi
+if [ -d "$WINDIVERT64_SYS" ]
+then
+    echo "\tcopy $INSTALL/x64/WinDivert64.sys..."
+    cp "$WINDIVERT64_SYS" $INSTALL/x86
+fi
+echo "\tcopy $INSTALL/x86/WinDivert.lib..."
+cp install/$TARGET/i386/WinDivert.lib $INSTALL/x86
+echo "\tcopy $INSTALL/x86/WinDivert.dll..."
+cp install/$TARGET/i386/WinDivert.dll $INSTALL/x86
+echo "\tcopy $INSTALL/x86/netdump.exe..."
+cp install/$TARGET/i386/netdump.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/netfilter.exe..."
+cp install/$TARGET/i386/netfilter.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/passtru.exe..."
+cp install/$TARGET/i386/passthru.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/webfilter.exe..."
+cp install/$TARGET/i386/webfilter.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/streamdump.exe..."
+cp install/$TARGET/i386/streamdump.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/flowtrack.exe..."
+cp install/$TARGET/i386/flowtrack.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/socketdump.exe..."
+cp install/$TARGET/i386/socketdump.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/windivertctl.exe..."
+cp install/$TARGET/i386/windivertctl.exe $INSTALL/x86
+echo "\tcopy $INSTALL/x86/test.exe..."
+cp install/$TARGET/i386/test.exe $INSTALL/x86
+if [ -d "install/$TARGET/amd64" ]
+then
+    echo "\tmake $INSTALL/amd64..."
+    mkdir -p $INSTALL/x64
+    echo "\tcopy $INSTALL/amd64/WinDivert64.sys..."
+    cp "$WINDIVERT64_SYS" $INSTALL/x64
+    if ! grep "DigiCert High Assurance EV Root" \
+        $INSTALL/x64/WinDivert64.sys 2>&1 >/dev/null
     then
-        echo "SKIP $NAME-$TARGET"
-        continue
+        echo "\t\033[33mWARNING\033[0m: unsigned WinDivert64.sys..."
     fi
-    echo "BUILD $NAME"
-    INSTALL=install/$NAME
-    echo "\tmake $INSTALL..."
-    rm -rf $INSTALL
-    mkdir -p $INSTALL
-    echo "\tcopy $INSTALL/README..."
-    cp README $INSTALL
-    echo "\tcopy $INSTALL/CHANGELOG..."
-    cp CHANGELOG $INSTALL
-    echo "\tcopy $INSTALL/LICENSE..."
-    cp LICENSE $INSTALL
-    echo "\tcopy $INSTALL/VERSION..."
-    cp VERSION $INSTALL
-    echo "\tmake $INSTALL/include..."
-    mkdir -p $INSTALL/include
-    echo "\tcopy $INSTALL/include/windivert.h..."
-    cp include/windivert.h $INSTALL/include
-    echo "\tmake $INSTALL/doc..."
-    mkdir -p $INSTALL/doc
-    echo "\tcopy $INSTALL/doc/WinDivert.html..."
-    cp doc/windivert.html $INSTALL/doc/WinDivert.html
-    echo "\tmake $INSTALL/x86..."
-    mkdir -p $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/WinDivert32.sys..."
-    cp install/$TARGET/i386/WinDivert32.sys $INSTALL/x86
-    if ! grep "DigiCert High Assurance EV Root" $INSTALL/x86/WinDivert32.sys \
-        2>&1 >/dev/null
-    then
-        echo "\t\033[33mWARNING\033[0m: unsigned WinDivert32.sys..."
-    fi
-    if [ -d "install/$TARGET/amd64" ]
-    then
-        echo "\tcopy $INSTALL/amd64/WinDivert64.sys..."
-        cp install/$TARGET/amd64/WinDivert64.sys $INSTALL/x86
-    fi
-    echo "\tcopy $INSTALL/x86/WinDivert.lib..."
-    cp install/$TARGET/i386/WinDivert.lib $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/WinDivert.dll..."
-    cp install/$TARGET/i386/WinDivert.dll $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/netdump.exe..."
-    cp install/$TARGET/i386/netdump.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/netfilter.exe..."
-    cp install/$TARGET/i386/netfilter.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/passtru.exe..."
-    cp install/$TARGET/i386/passthru.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/webfilter.exe..."
-    cp install/$TARGET/i386/webfilter.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/streamdump.exe..."
-    cp install/$TARGET/i386/streamdump.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/flowtrack.exe..."
-    cp install/$TARGET/i386/flowtrack.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/socketdump.exe..."
-    cp install/$TARGET/i386/socketdump.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/windivertctl.exe..."
-    cp install/$TARGET/i386/windivertctl.exe $INSTALL/x86
-    echo "\tcopy $INSTALL/x86/test.exe..."
-    cp install/$TARGET/i386/test.exe $INSTALL/x86
-    if [ -d "install/$TARGET/amd64" ]
-    then
-        echo "\tmake $INSTALL/amd64..."
-        mkdir -p $INSTALL/x64
-        echo "\tcopy $INSTALL/amd64/WinDivert64.sys..."
-        cp install/$TARGET/amd64/WinDivert64.sys $INSTALL/x64
-        if ! grep "DigiCert High Assurance EV Root" \
-            $INSTALL/x64/WinDivert64.sys 2>&1 >/dev/null
-        then
-            echo "\t\033[33mWARNING\033[0m: unsigned WinDivert64.sys..."
-        fi
-        echo "\tcopy $INSTALL/x64/WinDivert.lib..."
-        cp install/$TARGET/amd64/WinDivert.lib $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/WinDivert.dll..."
-        cp install/$TARGET/amd64/WinDivert.dll $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/netdump.exe..."
-        cp install/$TARGET/amd64/netdump.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/netfilter.exe..."
-        cp install/$TARGET/amd64/netfilter.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/passtru.exe..."
-        cp install/$TARGET/amd64/passthru.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/webfilter.exe..."
-        cp install/$TARGET/amd64/webfilter.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/streamdump.exe..."
-        cp install/$TARGET/amd64/streamdump.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/flowtrack.exe..."
-        cp install/$TARGET/amd64/flowtrack.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/socketdump.exe..."
-        cp install/$TARGET/amd64/socketdump.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/windivertctl.exe..."
-        cp install/$TARGET/amd64/windivertctl.exe $INSTALL/x64
-        echo "\tcopy $INSTALL/x64/test.exe..."
-        cp install/$TARGET/amd64/test.exe $INSTALL/x64
-    else
-        echo "\tWARNING: skipping missing AMD64 build..."
-    fi
-    PACKAGE=$NAME.zip
-    echo "\tbuilding $PACKAGE..."
-    (
-        cd install;
-        zip -r $PACKAGE $NAME > /dev/null
-    )
-    echo -n "\tclean $INSTALL..."
-    rm -rf $INSTALL
-    echo "DONE"
-done
+    echo "\tcopy $INSTALL/x64/WinDivert.lib..."
+    cp install/$TARGET/amd64/WinDivert.lib $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/WinDivert.dll..."
+    cp install/$TARGET/amd64/WinDivert.dll $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/netdump.exe..."
+    cp install/$TARGET/amd64/netdump.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/netfilter.exe..."
+    cp install/$TARGET/amd64/netfilter.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/passtru.exe..."
+    cp install/$TARGET/amd64/passthru.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/webfilter.exe..."
+    cp install/$TARGET/amd64/webfilter.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/streamdump.exe..."
+    cp install/$TARGET/amd64/streamdump.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/flowtrack.exe..."
+    cp install/$TARGET/amd64/flowtrack.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/socketdump.exe..."
+    cp install/$TARGET/amd64/socketdump.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/windivertctl.exe..."
+    cp install/$TARGET/amd64/windivertctl.exe $INSTALL/x64
+    echo "\tcopy $INSTALL/x64/test.exe..."
+    cp install/$TARGET/amd64/test.exe $INSTALL/x64
+else
+    echo "\tWARNING: skipping missing AMD64 build..."
+fi
+PACKAGE=$NAME$LABEL.zip
+echo "\tbuilding $PACKAGE..."
+(
+    cd install;
+    zip -r $PACKAGE $NAME$LABEL > /dev/null
+)
+echo -n "\tclean $INSTALL..."
+rm -rf $INSTALL
+echo "DONE"