diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 6.0.1 (2023-05-08)
+
+#### Fixed
+
+- Restored the ability to compile with GHC versions earlier than 9.
+
 ## 6.0.0 (2023-04-29)
 
 A number of type changes have been made to improve parsing and comparison logic.
diff --git a/Data/Versions.hs b/Data/Versions.hs
--- a/Data/Versions.hs
+++ b/Data/Versions.hs
@@ -148,7 +148,7 @@
 mFromV (Version me (Chunks v) r _) = case me of
   Nothing -> f
   Just e  ->
-    let cs = NEL.singleton . MDigit e $ showt e
+    let cs = (:| []) . MDigit e $ showt e
     in Mess cs $ Just (VColon, f)
   where
     f :: Mess
diff --git a/versions.cabal b/versions.cabal
--- a/versions.cabal
+++ b/versions.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.2
 name:               versions
-version:            6.0.0
+version:            6.0.1
 synopsis:           Types and parsers for software version numbers.
 description:
   A library for parsing and comparing software version numbers. We like to give