diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 6ac2ccf45c18..2a7bb1a42ae2 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1035,8 +1035,6 @@ self: super: {
   # https://github.com/dmwit/encoding/pull/3
   encoding = appendPatch super.encoding ./patches/encoding-Cabal-2.0.patch;
 
-  clock = dontCheck (appendPatch super.clock ./patches/clock-0.7.2.patch);
-
   # Work around overspecified constraint on github ==0.18.
   github-backup = doJailbreak super.github-backup;
 
diff --git a/pkgs/development/haskell-modules/patches/clock-0.7.2.patch b/pkgs/development/haskell-modules/patches/clock-0.7.2.patch
deleted file mode 100644
index 8354c7fa5890..000000000000
--- a/pkgs/development/haskell-modules/patches/clock-0.7.2.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-diff --git a/System/Clock.hsc b/System/Clock.hsc
-index 297607b..c21196b 100644
---- a/System/Clock.hsc
-+++ b/System/Clock.hsc
-@@ -41,7 +41,9 @@ import GHC.Generics (Generic)
- #  endif
- #endif
-
--#let alignment t = "%lu", (unsigned long)offsetof(struct {char x__; t (y__); }, y__)
-+#if __GLASGOW_HASKELL__ < 800
-+#  let alignment t = "%lu", (unsigned long)offsetof(struct {char x__; t (y__); }, y__)
-+#endif
-
- -- | Clock types. A clock may be system-wide (that is, visible to all processes)
- --   or per-process (measuring time that is meaningful only within a process).
-diff --git a/cbits/hs_clock_win32.c b/cbits/hs_clock_win32.c
-index 5dcc2a9..ebdb7fe 100644
---- a/cbits/hs_clock_win32.c
-+++ b/cbits/hs_clock_win32.c
-@@ -28,12 +28,22 @@ static void to_timespec_from_100ns(ULONGLONG t_100ns, long long *t)
-     t[1] = 100*(long)(t_100ns % 10000000UL);
- }
-
-+/* See https://ghc.haskell.org/trac/ghc/ticket/15094 */
-+#if defined(_WIN32) && !defined(_WIN64)
-+__attribute__((optimize("-fno-expensive-optimizations")))
-+#endif
- void hs_clock_win32_gettime_monotonic(long long* t)
- {
-    LARGE_INTEGER time;
--   LARGE_INTEGER frequency;
-+   static LARGE_INTEGER frequency;
-+   static int hasFreq = 0;
-+
-    QueryPerformanceCounter(&time);
--   QueryPerformanceFrequency(&frequency);
-+   if (!hasFreq)
-+   {
-+      hasFreq = 1;
-+      QueryPerformanceFrequency(&frequency);
-+   }
-    // seconds
-    t[0] = time.QuadPart / frequency.QuadPart;
-    // nanos =
-diff --git a/clock.cabal b/clock.cabal
-index 0f2d18a..67d232e 100644
---- a/clock.cabal
-+++ b/clock.cabal
-@@ -41,8 +41,8 @@ description:   A package for convenient access to high-resolution clock and
- copyright:     Copyright © Cetin Sert 2009-2016, Eugene Kirpichov 2010, Finn Espen Gundersen 2013, Gerolf Seitz 2013, Mathieu Boespflug 2014 2015, Chris Done 2015, Dimitri Sabadie 2015, Christian Burger 2015, Mario Longobardi 2016
- license:       BSD3
- license-file:  LICENSE
--author:        Cetin Sert <cetin@corsis.eu>, Corsis Research
--maintainer:    Cetin Sert <cetin@corsis.eu>, Corsis Research
-+author:        Cetin Sert <cetin@corsis.tech>, Corsis Research
-+maintainer:    Cetin Sert <cetin@corsis.tech>, Corsis Research
- homepage:      https://github.com/corsis/clock
- bug-reports:   https://github.com/corsis/clock/issues
- category:      System