diff --git a/lib/src/PackageName.purs b/lib/src/PackageName.purs
index ccedf9f3..14655640 100644
--- a/lib/src/PackageName.purs
+++ b/lib/src/PackageName.purs
@@ -50,6 +50,7 @@ stripPureScriptPrefix pkg =
 -- | A Registry-compliant package name
 newtype PackageName = PackageName String
 
+derive newtype instance Show PackageName
 derive newtype instance Eq PackageName
 derive newtype instance Ord PackageName