Index: server/buildpkgs/common.sh
==================================================================
--- server/buildpkgs/common.sh
+++ server/buildpkgs/common.sh
@@ -63,10 +63,24 @@
 
 	rm -rf out
 
 	exit 0
 }
+
+function not_platforms_regexp () {
+	local platform_re
+
+	for platform_re in "$@"; do
+		if echo "${PLATFORM}" | grep -- "${platform_re}" >/dev/null; then
+			rm -rf out
+
+			exit 0
+		fi
+	done
+
+	return 0
+}
 
 function download () {
 	local url file
 
 	file="$1"

Index: server/buildpkgs/tcc4tcl/build.sh
==================================================================
--- server/buildpkgs/tcc4tcl/build.sh
+++ server/buildpkgs/tcc4tcl/build.sh
@@ -12,10 +12,13 @@
 source ../common.sh
 
 # Do not build if the "tcl" platform has been requested
 not_platforms 'tcl'
 
+# Do not support multiarch builds
+not_platforms_regexp '^macosx.*i386-x86_64' '^macosx.*x86_64-i386'
+
 # Requires Tcl 8.5 or newer
 setup_tcl 8.5 8.6 || exit 1
 
 # Download source
 download_src