diff --git a/sets/development.conf b/sets/development.conf
index 9c8b5c7..e0c58b4 100644
--- a/sets/development.conf
+++ b/sets/development.conf
@@ -62,12 +62,12 @@
 * dev-libs/libunwind
 
 # scala
-* dev-lang/scala-bin
-* dev-scala/sbt
+#* dev-lang/scala-bin
+#* dev-scala/sbt
 
 # erlang
-* dev-erlang/rebar
-* dev-lang/erlang
+#* dev-erlang/rebar
+#* dev-lang/erlang
 
 # leksah
 #* net-libs/webkit:3.0
@@ -84,8 +84,8 @@
 * fonts/FiraCode
 
 # fstar
-* dev-lang/fstar
-* dev-lang/fsharp
+#* dev-lang/fstar
+#* dev-lang/fsharp
 
 # python
 * dev-lang/python:2.7
@@ -108,7 +108,7 @@
 
 # clojure
 * app-misc/rlwrap
-* dev-lang/clojure
+#* dev-lang/clojure
 * net-misc/socat
 
 # others