diff --git a/0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch b/0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch
deleted file mode 100644
index f52b9c1..0000000
--- a/0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-From 8f62d424f52cda226f5b7102f2de45e92b72b552 Mon Sep 17 00:00:00 2001
-From: Peter Simons <simons@cryp.to>
-Date: Wed, 1 Feb 2023 16:03:29 +0100
-Subject: [PATCH] Adapt FastShift instances for Word32 to ghc-9.4.x.
-
----
- Data/BloomFilter/Util.hs | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/Data/BloomFilter/Util.hs b/Data/BloomFilter/Util.hs
-index 7f695dc..6868209 100644
---- a/Data/BloomFilter/Util.hs
-+++ b/Data/BloomFilter/Util.hs
-@@ -40,10 +40,10 @@ class FastShift a where
- 
- instance FastShift Word32 where
-     {-# INLINE shiftL #-}
--    shiftL (W32# x#) (I# i#) = W32# (x# `uncheckedShiftL#` i#)
-+    shiftL (W32# x#) (I# i#) = W32# (x# `uncheckedShiftLWord32#` i#)
- 
-     {-# INLINE shiftR #-}
--    shiftR (W32# x#) (I# i#) = W32# (x# `uncheckedShiftRL#` i#)
-+    shiftR (W32# x#) (I# i#) = W32# (x# `uncheckedShiftRLWord32#` i#)
- 
- instance FastShift Word64 where
-     {-# INLINE shiftL #-}
--- 
-2.38.1
-
diff --git a/ghc-bloomfilter.spec b/ghc-bloomfilter.spec
index 354bcef..7507ac8 100644
--- a/ghc-bloomfilter.spec
+++ b/ghc-bloomfilter.spec
@@ -26,7 +26,6 @@ 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/2.cabal#/%{pkg_name}.cabal
-Patch1:         0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-array-devel
 BuildRequires:  ghc-bytestring-devel
@@ -54,9 +53,8 @@ Requires(postun): ghc-compiler = %{ghc_version}
 This package provides the Haskell %{pkg_name} library development files.
 
 %prep
-%autosetup -p1 -n %{pkg_name}-%{version}
+%autosetup -n %{pkg_name}-%{version}
 cp -p %{SOURCE1} %{pkg_name}.cabal
-cabal-tweak-dep-ver base '>= 4.4 && < 4.16' '< 5'
 
 %build
 %ghc_lib_build