diff --git a/mocha-common/build b/mocha-common/build
index 60cfe21..343153a 100755
--- a/mocha-common/build
+++ b/mocha-common/build
@@ -4,6 +4,39 @@ if [ ! -d output ]; then
 	mkdir output
 fi
 
-./yaml2mcl --export-entities=output/net.alcetech.Mocha.Core.css -o output/net.alcetech.Mocha.Core.mcl data/libraries/yaml/net.alcetech.Mocha.Core
-./yaml2mcl --export-entities=output/net.alcetech.Mocha.System.cs -o output/net.alcetech.Mocha.System.mcl data/libraries/yaml/net.alcetech.Mocha.System
-./yaml2mcl --reference output/net.alcetech.Mocha.System.mcl --export-entities=output/net.alcetech.Mocha.Web.cs -o output/net.alcetech.Mocha.Web.mcl data/libraries/yaml/net.alcetech.Mocha.Web
+PROJECTS="net.alcetech.Mocha.Core net.alcetech.Mocha.System"
+PROJECTS_WITH_SYSTEM_REFS="net.alcetech.Mocha.Web"
+
+if [ "$1" != "" ]; then
+	PROJECT_SELECTED="$1"
+fi
+
+for p in $PROJECTS; do
+
+	if [ $PROJECT_SELECTED != "" ]; then
+		if [ "$p" != "$PROJECT_SELECTED" ]; then
+			continue
+		fi
+	fi
+
+	if [ $PROJECT_SELECTED != "" ]; then
+		if [ $p != $PROJECT_SELECTED ]; then
+			continue
+		fi
+	fi
+
+	./yaml2mcl --export-entities=output/$p.cs -o output/$p.mcl data/libraries/yaml/$p
+
+done
+
+for p in $PROJECTS_WITH_SYSTEM_REFS; do
+
+	if [ $PROJECT_SELECTED != "" ]; then
+                if [ "$p" != "$PROJECT_SELECTED" ]; then
+                        continue
+                fi
+        fi
+
+	./yaml2mcl --reference output/net.alcetech.Mocha.System.mcl --export-entities=output/$p.cs -o output/$p.mcl data/libraries/yaml/$p
+
+done