diff --git a/ghc-simple-sendfile.changes b/ghc-simple-sendfile.changes
index afff4c5..c4dd291 100644
--- a/ghc-simple-sendfile.changes
+++ b/ghc-simple-sendfile.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Apr 17 14:13:48 UTC 2023 - Peter Simons <psimons@suse.com>
+
+- Update simple-sendfile to version 0.2.30 revision 1.
+  Upstream has revised the Cabal build instructions on Hackage.
+
 -------------------------------------------------------------------
 Thu Mar 30 17:08:16 UTC 2023 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-simple-sendfile.spec b/ghc-simple-sendfile.spec
index f12d8e2..96761d8 100644
--- a/ghc-simple-sendfile.spec
+++ b/ghc-simple-sendfile.spec
@@ -26,6 +26,7 @@ Summary:        Cross platform library for the sendfile system call
 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-base-devel
 BuildRequires:  ghc-base-prof
@@ -87,6 +88,7 @@ This package provides the Haskell %{pkg_name} profiling library.
 
 %prep
 %autosetup -n %{pkg_name}-%{version}
+cp -p %{SOURCE1} %{pkg_name}.cabal
 
 %build
 %ghc_lib_build
diff --git a/simple-sendfile.cabal b/simple-sendfile.cabal
new file mode 100644
index 0000000..1af8ddb
--- /dev/null
+++ b/simple-sendfile.cabal
@@ -0,0 +1,77 @@
+Name:                   simple-sendfile
+Version:                0.2.30
+x-revision: 1
+Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
+Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
+License:                BSD3
+License-File:           LICENSE
+Synopsis:               Cross platform library for the sendfile system call
+Description:            Cross platform library for the sendfile system call.
+                        This library tries to call minimum system calls which
+                        are the bottleneck of web servers.
+Category:               Network
+Cabal-Version:          >= 1.10
+Build-Type:             Simple
+
+Extra-source-files:     test/inputFile
+
+Flag allow-bsd
+  Description:          Allow use of BSD sendfile (disable on GNU/kFreeBSD)
+  Default:              True
+
+Library
+  Default-Language:     Haskell2010
+  GHC-Options:          -Wall
+  Exposed-Modules:      Network.Sendfile
+  Other-Modules:        Network.Sendfile.Types
+  Build-Depends:        base >= 4.8 && < 5
+                      , network
+                      , bytestring
+  -- NetBSD and OpenBSD don't have sendfile
+  if os(freebsd) && flag(allow-bsd)
+    CPP-Options:        -DOS_BSD
+    Other-Modules:      Network.Sendfile.BSD
+                        Network.Sendfile.IOVec
+    Build-Depends:      unix
+  else
+    if os(darwin)
+      CPP-Options:      -DOS_MacOS
+      Other-Modules:    Network.Sendfile.BSD
+                        Network.Sendfile.IOVec
+      Build-Depends:    unix
+    else
+      if os(linux)
+        CPP-Options:    -DOS_Linux
+        Exposed-Modules: System.Linux.Sendfile
+        Other-Modules:  Network.Sendfile.Linux
+        Build-Depends:  unix
+      else
+        Other-Modules:  Network.Sendfile.Fallback
+        Build-Depends:  conduit         >= 1.0 && < 1.4
+                      , conduit-extra   >= 1.0 && < 1.4
+                      , transformers    >= 0.2.2 && < 0.7
+                      , resourcet
+
+Test-Suite spec
+  Type:                 exitcode-stdio-1.0
+  Default-Language:     Haskell2010
+  Hs-Source-Dirs:       test
+  Main-Is:              Spec.hs
+  GHC-Options:          -Wall
+  Other-Modules:        SendfileSpec
+  Build-Depends:        base
+                      , HUnit
+                      , bytestring
+                      , conduit
+                      , conduit-extra
+                      , resourcet
+                      , directory
+                      , hspec >= 1.3
+                      , network
+                      , process
+                      , simple-sendfile
+                      , unix
+
+Source-Repository head
+  Type:                 git
+  Location:             git://github.com/kazu-yamamoto/simple-sendfile