diff --git a/config/fish/functions/fish_right_prompt.fish b/config/fish/functions/fish_right_prompt.fish
index ae29d58..a81d078 100644
--- a/config/fish/functions/fish_right_prompt.fish
+++ b/config/fish/functions/fish_right_prompt.fish
@@ -5,6 +5,6 @@ function fish_right_prompt
   if contains rbenv (functions)
     echo $red(rbenv version-name)$normal
   else if contains asdf (functions)
-    echo $red(asdf current ruby | awk '{print $2}')$normal
+    echo $red(fast-asdf-ruby-version | awk '$1 == "ruby" { print $2 }')$normal
   end
 end
diff --git a/local/bin/fast-asdf-ruby-version b/local/bin/fast-asdf-ruby-version
new file mode 100755
index 0000000..1e7bee6
--- /dev/null
+++ b/local/bin/fast-asdf-ruby-version
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+asdf_path="$PWD"
+asdf_info=
+
+# Make sure asdf is currently active.
+if [ "$ASDF_DIR" ]; then
+
+  # Traverse up directories until we hit an asdf directory or filesystem root.
+  while [ -z "$asdf_info" -o $asdf_path != '' ]; do
+    if [ -f "$asdf_path/.tool-versions" ]; then
+      asdf_path="$asdf_path/.tool-versions"
+      break
+    elif [ -f "$asdf_path/.ruby-version" ]; then
+      asdf_path="$asdf_path/.ruby-version"
+      break
+    else
+      asdf_path="${asdf_path%/*}"
+    fi
+  done
+
+  # Use array manipulations and IFS to replace newlines with '/'.
+  if [ -f "$asdf_path" ]; then
+    IFS=$'\n'
+    asdf_info=($(<"$asdf_path"))
+    IFS='/'
+    asdf_info="${asdf_info[*]}"
+  fi
+fi
+
+echo $asdf_info
diff --git a/tool-versions b/tool-versions
index a7e49f2..e69d0de 100644
--- a/tool-versions
+++ b/tool-versions
@@ -1 +1,2 @@
 ruby 3.0.1
+nodejs 14.17.3