epeg: replace license with mit-enna (#458238)

lib/licenses.nix

@@ -993,6 +993,11 @@ lib.mapAttrs mkLicense (
       fullName = "CMU License";
     };
 
+    mit-enna = {
+      spdxId = "MIT-enna";
+      fullName = "enna License";
+    };
+
     mit-feh = {
       spdxId = "MIT-feh";
       fullName = "feh License";

pkgs/by-name/ep/epeg/package.nix

@@ -43,9 +43,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/mattes/epeg";
     description = "Insanely fast JPEG/ JPG thumbnail scaling";
     platforms = platforms.linux ++ platforms.darwin;
-    license = {
-      url = "https://github.com/mattes/epeg#license";
-    };
+    license = lib.licenses.mit-enna;
     maintainers = with maintainers; [ nh2 ];
     mainProgram = "epeg";
   };