diff --git a/config/direnv/direnvrc b/config/direnv/direnvrc
new file mode 100644
index 0000000..3144c3c
--- /dev/null
+++ b/config/direnv/direnvrc
@@ -0,0 +1,52 @@
+project() {
+  local cmd=$1
+  log_status "project $*"
+  shift
+
+  export PROJECT_DIR=$PWD
+
+  "project_$cmd" "$@"
+}
+
+# Languages
+
+project_erlang() {
+  export ERL_AFLAGS="-kernel shell_history enabled"
+
+  export REBAR_GLOBAL_CONFIG_DIR=$(direnv_layout_dir)/rebar
+  export REBAR_CACHE_DIR=$(direnv_layout_dir)/rebar
+}
+
+project_elixir()  {
+  project_erlang
+
+  export MIX_HOME=$(direnv_layout_dir)/mix
+  export HEX_HOME=$(direnv_layout_dir)/hex
+
+  PATH_add $MIX_HOME/bin
+  PATH_add $HEX_HOME/bin
+}
+
+project_node() {
+  export NODE_PATH=$(direnv_layout_dir)/node
+  export NPM_CONFIG_PREFIX=$(direnv_layout_dir)/npm/config
+  export NPM_CONFIG_CACHE=$(direnv_layout_dir)/npm/cache
+  export NPM_CONFIG_DEVDIR=$(direnv_layout_dir)/npm/dev
+
+  PATH_add $NODE_PATH/bin
+  PATH_add node_modules/.bin
+}
+
+project_ruby() {
+  export GEM_HOME=$(direnv_layout_dir)/gem
+  export BUNDLE_USER_HOME=$(direnv_layout_dir)/bundle
+
+  PATH_add $GEM_HOME/bin
+}
+
+# Frameworks
+
+project_rails() {
+  project_ruby
+  project_node
+}
diff --git a/programs/direnv.nix b/programs/direnv.nix
index 8bb942a..538b5dc 100644
--- a/programs/direnv.nix
+++ b/programs/direnv.nix
@@ -1,40 +1,11 @@
+let
+  direnvrc = ../config/direnv/direnvrc;
+in
 {
   programs.direnv = {
     enable = true;
     nix-direnv.enable = true;
 
-    stdlib = ''
-      project() {
-        local cmd=$1
-        log_status "project $*"
-        shift
-        "project_$cmd" "$@"
-      }
-
-      # Languages
-
-      project_ruby() {
-        export GEM_HOME=$(direnv_layout_dir)/gem
-        export BUNDLE_USER_HOME=$(direnv_layout_dir)/bundle
-
-        PATH_add $GEM_HOME/bin
-      }
-
-      project_node() {
-        export NODE_PATH=$(direnv_layout_dir)/node
-        export NPM_CONFIG_PREFIX=$(direnv_layout_dir)/npm/config
-        export NPM_CONFIG_CACHE=$(direnv_layout_dir)/npm/cache
-
-        PATH_add $NODE_PATH/bin
-        PATH_add node_modules/.bin
-      }
-
-      # Frameworks
-
-      project_rails() {
-        project_ruby()
-        project_node()
-      }
-    '';
+    stdlib = direnvrc;
   };
 }