diff --git a/bb.edn b/bb.edn
index 980653b..ceffd85 100644
--- a/bb.edn
+++ b/bb.edn
@@ -8,9 +8,10 @@
                    (fs/delete-if-exists "brut.min.css")
                    (fs/delete-if-exists "brut-nocolors.min.css"))}
   build-site {:doc "build the HTML"
-              :requires ([brut.main])
-              :task (brut.main/-main)}
+              :requires ([brut.site])
+              :task (brut.site/-main)}
   build-css {:doc "build the CSS"
-             :task (shell "./build.clj")}
+             :requires ([brut.build-css])
+             :task (brut.build-css/-main)}
   build {:doc "Build everything"
          :depends [build-css build-site]}}}
diff --git a/bb/brut/build_css.clj b/bb/brut/build_css.clj
new file mode 100644
index 0000000..5da7815
--- /dev/null
+++ b/bb/brut/build_css.clj
@@ -0,0 +1,42 @@
+(ns brut.build-css
+  (:require
+   [babashka.fs :as fs]
+   [babashka.process :refer [process]]))
+
+(defn -main [& _args]
+  (let [dist "_build"
+        tmp-dir (-> (fs/create-temp-dir)
+                    (fs/delete-on-exit))
+        tmp-css (fs/file tmp-dir "tmp.css")
+        brut-css "brut.min.css"
+        sub-css ["colors"
+                 "extended-colors"
+                 "general"
+                 "buttons"
+                 "grid"
+                 "components"
+                 "headings"
+                 "icons"
+                 "forms"
+                 "navbar"
+                 "tables"
+                 "messages"]
+        current-year (-> (new java.util.Date)
+                         .getYear
+                         ;; yeah... it's dumb
+                         (+ 1900))]
+
+    (fs/create-dirs dist)
+    (spit tmp-css (format "/* Copyright %s Yann Esposito; MIT licensed */" current-year))
+    (doseq [item sub-css]
+      (printf "building: %s\n" item)
+      (let [css (fs/file tmp-dir (str item ".css"))
+            min-css (fs/file dist (str item ".min.css"))
+            _ @(process ["lessc" (format "src/%s.less" item)]  {:out css})
+            minified (-> @(process ["minify" css]  {:out :string}) :out)]
+        (spit min-css minified)
+        (when-not (= "extended-colors" item)
+          (spit tmp-css minified :append true))))
+    (fs/move tmp-css brut-css {:replace-existing true
+                               :atomic-move true})
+    (println "built: " brut-css)))
diff --git a/bb/brut/main.clj b/bb/brut/site.clj
similarity index 99%
rename from bb/brut/main.clj
rename to bb/brut/site.clj
index c99ff20..7f10d8d 100644
--- a/bb/brut/main.clj
+++ b/bb/brut/site.clj
@@ -1,4 +1,4 @@
-(ns brut.main
+(ns brut.site
   (:require [hiccup2.core :as h]
             [clojure.string :as string]
             [babashka.fs :as fs]))