Index: server/buildpkgs/build_all.sh
==================================================================
--- server/buildpkgs/build_all.sh
+++ server/buildpkgs/build_all.sh
@@ -73,11 +73,24 @@
 			echo '#undef strtod' > "${TCLPRIVATE}/compat/strtod.c.new"
 			cat "${TCLPRIVATE}/compat/strtod.c" >> "${TCLPRIVATE}/compat/strtod.c.new"
 			cat "${TCLPRIVATE}/compat/strtod.c.new" > "${TCLPRIVATE}/compat/strtod.c"
 			rm -f "${TCLPRIVATE}/compat/strtod.c.new"
 
-			for dir in unix win macosx; do
+			tcl_platform_dir='unix win macosx'
+
+			case "${CC}" in
+				*mingw*)
+					# If the compiler looks like Mingw, use Windows
+					tcl_platform_dir='win'
+					;;
+				*-*-*)
+					# Default for cross-compiling is UNIX
+					tcl_platform_dir='unix'
+					;;
+			esac
+
+			for dir in ${tcl_platform_dir}; do
 				cd "${TCLPRIVATE}/${dir}" || exit 1
 
 				echo " Executing: ./configure --enable-threads ${CONFIGUREEXTRA} --prefix=\"${TCLINSTDIR}\""
 				./configure --enable-threads ${CONFIGUREEXTRA} --prefix="${TCLINSTDIR}"