diff --git a/either.cabal b/either.cabal
new file mode 100644
index 0000000..c494ebf
--- /dev/null
+++ b/either.cabal
@@ -0,0 +1,70 @@
+name:          either
+category:      Control, Monads
+version:       5.0.1.1
+x-revision: 1
+license:       BSD3
+cabal-version: >= 1.10
+license-file:  LICENSE
+author:        Edward A. Kmett
+maintainer:    Edward A. Kmett <ekmett@gmail.com>
+stability:     provisional
+homepage:      http://github.com/ekmett/either/
+bug-reports:   http://github.com/ekmett/either/issues
+copyright:     Copyright (C) 2008-2017 Edward A. Kmett
+synopsis:      Combinators for working with sums
+description:   Combinators for working with sums.
+build-type:    Simple
+tested-with:   GHC == 7.0.4
+             , GHC == 7.2.2
+             , GHC == 7.4.2
+             , GHC == 7.6.3
+             , GHC == 7.8.4
+             , GHC == 7.10.3
+             , GHC == 8.0.2
+             , GHC == 8.2.2
+             , GHC == 8.4.4
+             , GHC == 8.6.5
+             , GHC == 8.8.1
+extra-source-files:
+  .gitignore
+  .ghci
+  .vim.custom
+  .travis.yml
+  CHANGELOG.markdown
+  README.markdown
+
+source-repository head
+  type: git
+  location: git://github.com/ekmett/either.git
+
+library
+  build-depends:
+    base              >= 4       && < 5,
+    bifunctors        >= 4       && < 6,
+    mtl               >= 2.0     && < 2.3,
+    profunctors       >= 4       && < 6,
+    semigroupoids     >= 4       && < 6
+
+  if !impl(ghc >= 8.0)
+    build-depends: semigroups >= 0.8.3.1 && < 1
+
+  other-extensions: CPP Rank2Types
+  ghc-options: -Wall
+  hs-source-dirs: src
+  default-language: Haskell2010
+  exposed-modules:
+    Data.Either.Combinators
+    Data.Either.Validation
+
+test-suite tests
+  ghc-options: -Wall -threaded -rtsopts -with-rtsopts=-N
+  type: exitcode-stdio-1.0
+  main-is: Main.hs
+  hs-source-dirs: tests
+  build-depends:
+    base,
+    either,
+    test-framework             >= 0.8.1.1 && < 0.9,
+    test-framework-quickcheck2 >= 0.3.0.3 && < 0.4,
+    QuickCheck                 >= 2.9     && < 2.15
+  default-language: Haskell2010
diff --git a/ghc-either.changes b/ghc-either.changes
index 774abaf..ed350ea 100644
--- a/ghc-either.changes
+++ b/ghc-either.changes
@@ -1,3 +1,19 @@
+-------------------------------------------------------------------
+Mon Aug 31 09:34:31 UTC 2020 - psimons@suse.com
+
+- Update either to version 5.0.1.1 revision 1.
+  Upstream has revised the Cabal build instructions on Hackage.
+
+-------------------------------------------------------------------
+Tue Aug 18 10:44:44 UTC 2020 - Peter Simons <psimons@suse.com>
+
+- Replace %setup -q with the more modern %autosetup macro.
+
+-------------------------------------------------------------------
+Thu May  7 08:38:39 UTC 2020 - Peter Simons <psimons@suse.com>
+
+- Update Cabal file to get more accurate dependency information.
+
 -------------------------------------------------------------------
 Fri Nov  8 16:13:40 UTC 2019 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-either.spec b/ghc-either.spec
index 18b47e2..3d34331 100644
--- a/ghc-either.spec
+++ b/ghc-either.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package ghc-either
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2020 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -25,6 +25,7 @@ Summary:        Combinators for working with sums
 License:        BSD-3-Clause
 URL:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
+Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/1.cabal#/%{pkg_name}.cabal
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-bifunctors-devel
 BuildRequires:  ghc-mtl-devel
@@ -51,7 +52,8 @@ Requires(postun): ghc-compiler = %{ghc_version}
 This package provides the Haskell %{pkg_name} library development files.
 
 %prep
-%setup -q -n %{pkg_name}-%{version}
+%autosetup -n %{pkg_name}-%{version}
+cp -p %{SOURCE1} %{pkg_name}.cabal
 
 %build
 %ghc_lib_build