diff --git a/pkgs/development/tools/ocaml/ocaml-top/default.nix b/pkgs/development/tools/ocaml/ocaml-top/default.nix
index 7336439240d5..3ceb9b1622c1 100644
--- a/pkgs/development/tools/ocaml/ocaml-top/default.nix
+++ b/pkgs/development/tools/ocaml/ocaml-top/default.nix
@@ -1,15 +1,15 @@
-{ stdenv, fetchzip, ncurses, ocamlPackages }:
+{ lib, fetchzip, ncurses, ocamlPackages }:
 
 with ocamlPackages; buildDunePackage rec {
   pname = "ocaml-top";
-  version = "1.1.5";
+  version = "1.2.0-rc";
 
   src = fetchzip {
     url = "https://github.com/OCamlPro/ocaml-top/archive/${version}.tar.gz";
-    sha256 = "1d4i6aanrafgrgk4mh154k6lkwk0b6mh66rykz33awlf5pfqd8yv";
+    sha256 = "1r290m9vvr25lgaanivz05h0kf4fd3h5j61wj4hpp669zffcyyb5";
   };
 
-  buildInputs = [ ncurses ocp-build lablgtk ocp-index ];
+  buildInputs = [ ncurses ocp-build lablgtk3-sourceview3 ocp-index ];
 
   configurePhase = ''
     export TERM=xterm
@@ -18,8 +18,8 @@ with ocamlPackages; buildDunePackage rec {
 
   meta = {
     homepage = https://www.typerex.org/ocaml-top.html;
-    license = stdenv.lib.licenses.gpl3;
+    license = lib.licenses.gpl3;
     description = "A simple cross-platform OCaml code editor built for top-level evaluation";
-    maintainers = with stdenv.lib.maintainers; [ vbgl ];
+    maintainers = with lib.maintainers; [ vbgl ];
   };
 }