Fix unzipped directory name

Makefile

@@ -1,6 +1,6 @@
-export TOOL_NAME = XcodeGen
+TOOL_NAME = XcodeGen
 export TOOL_NAME_LOWER = xcodegen
-export VERSION = 1.6.0
+VERSION = 1.6.0
 
 PREFIX = /usr/local
 INSTALL_PATH = $(PREFIX)/bin/$(TOOL_NAME_LOWER)

scripts/archive.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-PACKAGE_NAME=${TOOL_NAME:?}-${VERSION:?}
+PACKAGE_NAME=${TOOL_NAME_LOWER:?}
 TMP=$(mktemp -d)/$PACKAGE_NAME
 BINDIR=$TMP/bin
 SHAREDIR=$TMP/share