diff --git a/pkgs/development/ocaml-modules/cfstream/default.nix b/pkgs/development/ocaml-modules/cfstream/default.nix
index db6d2b1d4401..0ec1949f5627 100644
--- a/pkgs/development/ocaml-modules/cfstream/default.nix
+++ b/pkgs/development/ocaml-modules/cfstream/default.nix
@@ -2,7 +2,7 @@
 
 buildDunePackage rec {
   pname = "cfstream";
-  version = "1.3.0";
+  version = "1.3.1";
 
   minimumOCamlVersion = "4.04.1";
 
@@ -10,7 +10,7 @@ buildDunePackage rec {
     owner = "biocaml";
     repo   = pname;
     rev    = version;
-    sha256 = "1bpzpci0cx6r3sdk183mm603wgzvvj46nlx0lpx44108anxcxbak";
+    sha256 = "0qnxfp6y294gjsccx7ksvwn9x5q20hi8sg24rjypzsdkmlphgdnd";
   };
 
   patches = [ ./git_commit.patch ];
diff --git a/pkgs/development/ocaml-modules/cfstream/git_commit.patch b/pkgs/development/ocaml-modules/cfstream/git_commit.patch
index 5f8d8f5ce31d..596cfdc70927 100644
--- a/pkgs/development/ocaml-modules/cfstream/git_commit.patch
+++ b/pkgs/development/ocaml-modules/cfstream/git_commit.patch
@@ -1,13 +1,13 @@
-diff --git a/lib/jbuild b/lib/jbuild
-index fcc5a39..d72d50c 100644
---- a/lib/jbuild
-+++ b/lib/jbuild
-@@ -10,7 +10,7 @@
- (rule (
-   (targets (GIT_COMMIT))
-   (deps (../bin/git_commit.sh))
--  (action (with-stdout-to ${@} (run ${<})))
-+  (action (with-stdout-to ${@} (run echo "None")))
- ))
+diff --git a/lib/dune b/lib/dune
+index 2266b87..344c704 100644
+--- a/lib/dune
++++ b/lib/dune
+@@ -8,7 +8,7 @@
+ (rule
+  (targets GIT_COMMIT)
+  (deps (:x ../bin/git_commit.sh))
+- (action (with-stdout-to %{targets} (run %{x})))
++ (action (with-stdout-to %{targets} (run echo None)))
+ )
  
- (rule (
+ (rule