diff --git a/dhall-nixpkgs/dhall-nixpkgs.cabal b/dhall-nixpkgs/dhall-nixpkgs.cabal
index 6fba0b4a7..c965551df 100644
--- a/dhall-nixpkgs/dhall-nixpkgs.cabal
+++ b/dhall-nixpkgs/dhall-nixpkgs.cabal
@@ -19,7 +19,7 @@ Executable dhall-to-nixpkgs
   Build-Depends:       base                 >= 4.11     && < 5
                      , aeson                >= 1.0.0.0  && < 2.1
                      , base16-bytestring    >= 1.0.0.0
-                     , base64-bytestring    >= 1.2.1.0
+                     , base64-bytestring    >= 1.1.0.0
                      , bytestring                          < 0.12
                      , data-fix
                      , dhall                >= 1.32.0   && < 1.41
diff --git a/nix/packages/base64-bytestring.nix b/nix/packages/base64-bytestring.nix
deleted file mode 100644
index 9510a9bf3..000000000
--- a/nix/packages/base64-bytestring.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-{ mkDerivation, base, bytestring, criterion, deepseq, HUnit, lib
-, QuickCheck, test-framework, test-framework-hunit
-, test-framework-quickcheck2
-}:
-mkDerivation {
-  pname = "base64-bytestring";
-  version = "1.2.1.0";
-  sha256 = "fbf8ed30edde271eb605352021431d8f1b055f95a56af31fe2eacf6bdfdc49c9";
-  libraryHaskellDepends = [ base bytestring ];
-  testHaskellDepends = [
-    base bytestring HUnit QuickCheck test-framework
-    test-framework-hunit test-framework-quickcheck2
-  ];
-  benchmarkHaskellDepends = [ base bytestring criterion deepseq ];
-  homepage = "https://github.com/haskell/base64-bytestring";
-  description = "Fast base64 encoding and decoding for ByteStrings";
-  license = lib.licenses.bsd3;
-}