From 02ee8250186f0489bf86b036581a63c38afd54db Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Thu, 20 Aug 2020 07:17:49 +0200
Subject: [PATCH] =?UTF-8?q?ocamlPackages.cpdf:=202.3=20=E2=86=92=202.3.1?=
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---
 pkgs/development/ocaml-modules/cpdf/default.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/ocaml-modules/cpdf/default.nix b/pkgs/development/ocaml-modules/cpdf/default.nix
index 3b68acaee71..e40f6531e1f 100644
--- a/pkgs/development/ocaml-modules/cpdf/default.nix
+++ b/pkgs/development/ocaml-modules/cpdf/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub, ocaml, findlib, camlpdf, ncurses }:
 
-let version = "2.3"; in
+let version = "2.3.1"; in
 
 stdenv.mkDerivation {
   name = "ocaml${ocaml.version}-cpdf-${version}";
@@ -9,9 +9,13 @@ stdenv.mkDerivation {
     owner = "johnwhitington";
     repo = "cpdf-source";
     rev = "v${version}";
-    sha256 = "0i976y1v0l7x7k2n8k6v0h4bw9zlxsv04y4fdxss6dzpsfz49w23";
+    sha256 = "1gwz0iy28f67kbqap2q10nf98dalwbi03vv5j893z2an7pb4w68z";
   };
 
+  prePatch = ''
+    substituteInPlace META --replace 'version="1.7"' 'version="${version}"'
+  '';
+
   buildInputs = [ ocaml findlib ncurses ];
   propagatedBuildInputs = [ camlpdf ];