diff --git a/pkgs/development/libraries/haskell/CS173Tourney/default.nix b/pkgs/development/libraries/haskell/CS173Tourney/default.nix
index ac35433e144..bc96b56b12c 100644
--- a/pkgs/development/libraries/haskell/CS173Tourney/default.nix
+++ b/pkgs/development/libraries/haskell/CS173Tourney/default.nix
@@ -1,4 +1,4 @@
-{cabal, fetchgit, json, time, hslogger, Crypto, base64string, CouchDB, WebServer, WebServerExtras}:
+{cabal, fetchgit, json, time, hslogger, Crypto, base64String, CouchDB, WebServer, WebServerExtras}:
 
 cabal.mkDerivation (self : {
   pname = "CS173Tourney";
@@ -10,7 +10,7 @@ cabal.mkDerivation (self : {
     md5 = "21e5e5c2e184b4b70696d4d6c60e51d3";
   };
   patches = [./sendmail.patch];
-  propagatedBuildInputs = [json time hslogger Crypto base64string CouchDB WebServer WebServerExtras];
+  propagatedBuildInputs = [json time hslogger Crypto base64String CouchDB WebServer WebServerExtras];
   meta = {
     description = "";
   };
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index ac603aa4b2a..fedba275bff 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -384,7 +384,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   authenticate = callPackage ../development/libraries/haskell/authenticate {};
 
-  base64string = callPackage ../development/libraries/haskell/base64-string {};
+  base64String = callPackage ../development/libraries/haskell/base64-string {};
 
   base64Bytestring = callPackage ../development/libraries/haskell/base64-bytestring {};