diff --git a/Formula/d/darcs.rb b/Formula/d/darcs.rb
index 359da8a2b2897..d571ead7e286b 100644
--- a/Formula/d/darcs.rb
+++ b/Formula/d/darcs.rb
@@ -1,17 +1,17 @@
 class Darcs < Formula
   desc "Distributed version control system that tracks changes, via Haskell"
   homepage "https://darcs.net/"
-  url "https://hackage.haskell.org/package/darcs-2.18.4/darcs-2.18.4.tar.gz"
-  sha256 "f4bc276f2f785c8f8c9bcf97288f124a4e907540140213fe47b1049e2d240338"
+  url "https://hackage.haskell.org/package/darcs-2.18.5/darcs-2.18.5.tar.gz"
+  sha256 "e310692989e313191824f532a26c5eae712217444214266503d5eb5867f951ab"
   license "GPL-2.0-or-later"
 
   bottle do
-    sha256 cellar: :any_skip_relocation, arm64_sequoia: "6ab51d3124d6071463a5e68555cb466acc9411a8962450abf3ebdd23272a3a7e"
-    sha256 cellar: :any_skip_relocation, arm64_sonoma:  "16c95a9b58eb5f73267878a640c60efe5265aaebe46a5b50a088a6cc58771964"
-    sha256 cellar: :any_skip_relocation, arm64_ventura: "1109f1290bde12f969e687acb3eeaecb167eb6ab53a88c2f2bcaa1e170243ad5"
-    sha256 cellar: :any_skip_relocation, sonoma:        "0d72e2013f16f2b4c07b3f73bebc8576d412bd9d505ecc27f2a8d3d633ec7269"
-    sha256 cellar: :any_skip_relocation, ventura:       "3fee618610376d14ced94634aa36472da02617369051d6e3e33de74a7b6f5f1e"
-    sha256 cellar: :any_skip_relocation, x86_64_linux:  "84301f6b1449333210b9c3ae435e09f83e7967c5d33761c089186426c9d834de"
+    sha256 cellar: :any_skip_relocation, arm64_sequoia: "507dfc31c10438735098621aed6c75916d2b807bc7a72f957dbc0e808ff65916"
+    sha256 cellar: :any_skip_relocation, arm64_sonoma:  "2772f85e77f266ccecd9f8c5dbabf09b965b789d92b1d7c202989317cb832e7e"
+    sha256 cellar: :any_skip_relocation, arm64_ventura: "22caed7f5b40475b198b0474c056c477f8d6b6cbbb980b14a813829d362d9261"
+    sha256 cellar: :any_skip_relocation, sonoma:        "d73fa876ba56773601ad0aba9d459a14bd08f9678a1c1ef412b099b2f10bb11f"
+    sha256 cellar: :any_skip_relocation, ventura:       "22ad293dec66d2b02d524e7f2b2f7a41d667af225130a832d26023cad73088a0"
+    sha256 cellar: :any_skip_relocation, x86_64_linux:  "caaab41754cacb2f6265623542eae257e1c2dfd5ef0d585632ca1dcad59cfc91"
   end
 
   depends_on "cabal-install" => :build
@@ -55,7 +55,7 @@ def install
 +++ new-darcs.net/darcs.cabal	2025-01-05 10:09:26
 @@ -123,7 +123,7 @@
  -- ----------------------------------------------------------------------
- 
+
  custom-setup
 -    setup-depends: base      >= 4.10 && < 4.20,
 +    setup-depends: base      >= 4.10 && < 4.21,
@@ -65,7 +65,7 @@ def install
 @@ -412,7 +412,7 @@
      else
        build-depends:  unix >= 2.7.1.0 && < 2.9
- 
+
 -    build-depends:    base              >= 4.10 && < 4.20,
 +    build-depends:    base              >= 4.10 && < 4.21,
                        safe              >= 0.3.20 && < 0.4,
@@ -87,7 +87,7 @@ def install
 --- old-darcs.net/darcs.cabal	2025-01-05 10:24:34
 +++ new-darcs.net/darcs.cabal	2025-01-05 10:24:34
 @@ -124,7 +124,7 @@
- 
+
  custom-setup
      setup-depends: base      >= 4.10 && < 4.21,
 -                   Cabal     >= 2.4 && < 3.11,
@@ -95,30 +95,3 @@ def install
                     process   >= 1.2.3.0 && < 1.7,
                     filepath  >= 1.4.1 && < 1.5.0.0,
                     directory >= 1.2.7 && < 1.4
-diff -rN -u old-darcs.net/darcs.cabal new-darcs.net/darcs.cabal
---- old-darcs.net/darcs.cabal	2025-01-05 10:13:57
-+++ new-darcs.net/darcs.cabal	2025-01-05 10:13:57
-@@ -464,9 +464,9 @@
-     if impl(ghc >= 9.8)
-       cpp-options:    -DHAVE_CRYPTON_CONNECTION
-       build-depends:  crypton-connection >= 0.4 && < 0.5,
--                      data-default-class >= 0.1.2.0 && < 0.1.3,
-+                      data-default      >= 0.7.1.3 && < 0.9,
-                       http-client-tls   >= 0.3.5 && < 0.4,
--                      tls               >= 2.0.6 && < 2.1
-+                      tls               >= 2.0.6 && < 2.2
-     else
-       -- cannot use crypton-connection >= 0.4, so
-       -- constraining indirect dependency to work around problems
-diff -rN -u old-darcs.net/src/Darcs/Util/HTTP.hs new-darcs.net/src/Darcs/Util/HTTP.hs
---- old-darcs.net/src/Darcs/Util/HTTP.hs	2025-01-05 10:13:57
-+++ new-darcs.net/src/Darcs/Util/HTTP.hs	2025-01-05 10:13:57
-@@ -46,7 +46,7 @@
-     )
- 
- #ifdef HAVE_CRYPTON_CONNECTION
--import Data.Default.Class ( def )
-+import Data.Default ( def )
- import qualified Network.Connection as NC
- import Network.HTTP.Client.TLS
-     ( mkManagerSettings