diff --git a/pkgs/development/ocaml-modules/ppx_deriving/default.nix b/pkgs/development/ocaml-modules/ppx_deriving/default.nix
index 50dbbf1201b3..03a236a95518 100644
--- a/pkgs/development/ocaml-modules/ppx_deriving/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_deriving/default.nix
@@ -13,7 +13,7 @@
   ocaml-migrate-parsetree,
   version ?
     if lib.versionAtLeast ppxlib.version "0.36" then
-      "6.1.0"
+      "6.1.1"
     else if lib.versionAtLeast ppxlib.version "0.32" then
       "6.0.3"
     else if lib.versionAtLeast ppxlib.version "0.20" then
@@ -27,7 +27,7 @@
 let
   hash =
     {
-      "6.1.0" = "sha256-dHpWiOpjD3elCw6QJUrG+KZr3Ul0suhzdjQUJ4B9S1Y=";
+      "6.1.1" = "sha256-yR0epeFeaSii+JR9vRNbn3ZcwOLXK+JxQnmBr801DCQ=";
       "6.0.3" = "sha256-N0qpezLF4BwJqXgQpIv6IYwhO1tknkRSEBRVrBnJSm0=";
       "5.2.1" = "sha256:11h75dsbv3rs03pl67hdd3lbim7wjzh257ij9c75fcknbfr5ysz9";
       "5.1" = "sha256:1i64fd7qrfzbam5hfbl01r0sx4iihsahcwqj13smmrjlnwi3nkxh";
@@ -41,7 +41,9 @@ buildDunePackage rec {
   inherit version;
 
   src = fetchurl {
-    url = "https://github.com/ocaml-ppx/ppx_deriving/releases/download/v${version}/ppx_deriving-${lib.optionalString (lib.versionOlder version "6.0") "v"}${version}.tbz";
+    url = "https://github.com/ocaml-ppx/ppx_deriving/releases/download/v${version}/ppx_deriving-${lib.optionalString (lib.versionOlder version "6.0") "v"}${version}.${
+      if lib.versionAtLeast version "6.1.1" then "tar.gz" else "tbz"
+    }";
     inherit hash;
   };