diff --git a/eclass/ghc-package.eclass b/eclass/ghc-package.eclass
index 7e8a5aa0cba87..e1a8d65be3e64 100644
--- a/eclass/ghc-package.eclass
+++ b/eclass/ghc-package.eclass
@@ -4,6 +4,7 @@
 # @ECLASS: ghc-package.eclass
 # @MAINTAINER:
 # "Gentoo's Haskell Language team" <haskell@gentoo.org>
+# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6 7
 # @AUTHOR:
 # Original Author: Andres Loeh <kosmikus@gentoo.org>
 # @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
@@ -14,8 +15,9 @@ inherit multiprocessing
 
 # Maintain version-testing compatibility with ebuilds not using EAPI 7.
 case "${EAPI:-0}" in
+	0|1|2|3|7) ;;
 	4|5|6) inherit eapi7-ver ;;
-	*) ;;
+	*) die "EAPI ${EAPI} unsupported." ;;
 esac
 
 # GHC uses it's own native code generator. Portage's