diff --git a/Makefile b/Makefile
index 75080346d684323818b7f4c5480dd0b1785d32ee..ddc68bdd09aef4daca8ac0b71805c255fb6f48b0 100644
--- a/Makefile
+++ b/Makefile
@@ -50,7 +50,7 @@ workshop-check :
 ## ----------------------------------------
 ## Commands specific to lesson websites.
 
-.PHONY : lesson-check lesson-rmd lesson-files lesson-fixme lesson-single
+.PHONY : lesson-check lesson-rmd lesson-files lesson-fixme
 
 # RMarkdown files
 RMD_SRC = $(wildcard _episodes_rmd/??-*.Rmd)
diff --git a/_episodes_rmd/.gitkeep b/_episodes_rmd/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391