diff --git a/less/font-awesome.less b/less/font-awesome.less
deleted file mode 100644
index c3677def3..000000000
--- a/less/font-awesome.less
+++ /dev/null
@@ -1,18 +0,0 @@
-/*!
- *  Font Awesome 4.7.0 by @davegandy - http://fontawesome.io - @fontawesome
- *  License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
- */
-
-@import "variables.less";
-@import "mixins.less";
-@import "path.less";
-@import "core.less";
-@import "larger.less";
-@import "fixed-width.less";
-@import "list.less";
-@import "bordered-pulled.less";
-@import "animated.less";
-@import "rotated-flipped.less";
-@import "stacked.less";
-@import "icons.less";
-@import "screen-reader.less";
diff --git a/src/doc/Makefile b/src/doc/Makefile
index 7dd0a5d57..e54ad2aba 100644
--- a/src/doc/Makefile
+++ b/src/doc/Makefile
@@ -23,6 +23,10 @@ SITE_LESS = ${SITE_LESS_DIRECTORY}/site.less
 SITE_CSS = ${SITE_CSS_DIRECTORY}/site.css
 
 build:
+	@echo "Cleaning build dirs"
+	rm -rf ./less/
+	rm -rf ./scss/
+
 	@echo "Compiling Less files"
 	@mkdir -p ${FA_CSS_DIRECTORY}