diff --git a/ghc-regex-posix.changes b/ghc-regex-posix.changes
index fbab671..79bc7f9 100644
--- a/ghc-regex-posix.changes
+++ b/ghc-regex-posix.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu May  7 08:08:25 UTC 2020 - Peter Simons <psimons@suse.com>
+
+- Update Cabal file to get more accurate dependency information.
+
 -------------------------------------------------------------------
 Fri Nov  8 16:14:34 UTC 2019 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-regex-posix.spec b/ghc-regex-posix.spec
index b584950..1e1a3c8 100644
--- a/ghc-regex-posix.spec
+++ b/ghc-regex-posix.spec
@@ -24,6 +24,7 @@ Summary:        POSIX Backend for "Text.Regex" (regex-base)
 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-array-devel
 BuildRequires:  ghc-bytestring-devel
@@ -55,6 +56,7 @@ This package provides the Haskell %{pkg_name} library development files.
 
 %prep
 %setup -q -n %{pkg_name}-%{version}
+cp -p %{SOURCE1} %{pkg_name}.cabal
 
 %build
 %ghc_lib_build
diff --git a/regex-posix.cabal b/regex-posix.cabal
new file mode 100644
index 0000000..1a82a44
--- /dev/null
+++ b/regex-posix.cabal
@@ -0,0 +1,79 @@
+cabal-version:          1.12
+name:                   regex-posix
+version:                0.96.0.0
+x-revision: 1
+
+build-type:             Simple
+license:                BSD3
+license-file:           LICENSE
+copyright:              Copyright (c) 2007-2010, Christopher Kuklewicz
+author:                 Christopher Kuklewicz
+maintainer:             hvr@gnu.org
+bug-reports:            https://github.com/hvr/regex-posix
+synopsis:               POSIX Backend for "Text.Regex" (regex-base)
+category:               Text
+description:
+  The POSIX regex backend for <//hackage.haskell.org/package/regex-base regex-base>.
+  .
+  The main appeal of this backend is that it's very lightweight due to its reliance on the ubiquitous <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/regex.h.html POSIX.2 regex> facility that is provided by the standard C library on most POSIX platforms.
+  .
+  See also <https://wiki.haskell.org/Regular_expressions> for more information.
+
+extra-source-files:
+  ChangeLog.md
+  cbits/myfree.h
+
+source-repository head
+  type:     git
+  location: https://github.com/hvr/regex-posix.git
+
+flag _regex-posix-clib
+  manual: False
+  default: False
+  description: Use <//hackage.haskell.org/package/regex-posix-clib regex-posix-clib> package
+
+library
+  hs-source-dirs: src
+  exposed-modules:
+      Text.Regex.Posix
+      Text.Regex.Posix.Wrap
+      Text.Regex.Posix.String
+      Text.Regex.Posix.Sequence
+      Text.Regex.Posix.ByteString
+      Text.Regex.Posix.ByteString.Lazy
+
+  other-modules:
+      Paths_regex_posix
+
+  c-sources:        cbits/myfree.c
+  include-dirs:     cbits
+
+  if flag(_regex-posix-clib)
+    build-depends: regex-posix-clib == 2.7.*
+  else
+    -- use POSIX.2 regex implementation from @libc@
+    -- However, Windows/msys2 doesn't provide a POSIX.2 regex impl in its @libc@
+    if os(windows)
+      build-depends: base<0
+
+  default-language: Haskell2010
+  default-extensions:
+      MultiParamTypeClasses
+      FunctionalDependencies
+      ForeignFunctionInterface
+      GeneralizedNewtypeDeriving
+      FlexibleContexts
+      TypeSynonymInstances
+      FlexibleInstances
+
+  build-depends: regex-base == 0.94.*
+               , base       >= 4.3 && < 4.15
+               , containers >= 0.4 && < 0.7
+               , bytestring >= 0.9 && < 0.11
+               , array      >= 0.3 && < 0.6
+
+  if !impl(ghc >= 8)
+      build-depends: fail == 4.9.*
+
+  ghc-options: -O2
+               -Wall -fno-warn-unused-imports