diff --git a/pkgs/development/ocaml-modules/cmdliner/1_1.nix b/pkgs/development/ocaml-modules/cmdliner/1_1.nix
deleted file mode 100644
index cf03c32d7e8b..000000000000
--- a/pkgs/development/ocaml-modules/cmdliner/1_1.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  ocaml,
-}:
-
-stdenv.mkDerivation rec {
-  pname = "cmdliner";
-  version = "1.3.0";
-
-  src = fetchurl {
-    url = "https://erratique.ch/software/${pname}/releases/${pname}-${version}.tbz";
-    sha256 = "sha256-joGA9XO0QPanqMII2rLK5KgjhP7HMtInhNG7bmQWjLs=";
-  };
-
-  nativeBuildInputs = [ ocaml ];
-
-  makeFlags = [ "PREFIX=$(out)" ];
-  installTargets = "install install-doc";
-  installFlags = [
-    "LIBDIR=$(out)/lib/ocaml/${ocaml.version}/site-lib/${pname}"
-    "DOCDIR=$(out)/share/doc/${pname}"
-  ];
-  postInstall = ''
-    mv $out/lib/ocaml/${ocaml.version}/site-lib/${pname}/{opam,${pname}.opam}
-  '';
-
-  meta = {
-    homepage = "https://erratique.ch/software/cmdliner";
-    description = "OCaml module for the declarative definition of command line interfaces";
-    license = lib.licenses.isc;
-    inherit (ocaml.meta) platforms;
-    maintainers = [ lib.maintainers.vbgl ];
-    broken = !(lib.versionAtLeast ocaml.version "4.08");
-  };
-}
diff --git a/pkgs/development/ocaml-modules/cmdliner/1_0.nix b/pkgs/development/ocaml-modules/cmdliner/default.nix
similarity index 50%
rename from pkgs/development/ocaml-modules/cmdliner/1_0.nix
rename to pkgs/development/ocaml-modules/cmdliner/default.nix
index 772e688a9981..2bbd345df67e 100644
--- a/pkgs/development/ocaml-modules/cmdliner/1_0.nix
+++ b/pkgs/development/ocaml-modules/cmdliner/default.nix
@@ -3,15 +3,21 @@
   stdenv,
   fetchurl,
   ocaml,
+  version ? "1.3.0",
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "cmdliner";
-  version = "1.0.4";
+  inherit version;
 
   src = fetchurl {
-    url = "https://erratique.ch/software/${pname}/releases/${pname}-${version}.tbz";
-    sha256 = "1h04q0zkasd0mw64ggh4y58lgzkhg6yhzy60lab8k8zq9ba96ajw";
+    url = "https://erratique.ch/software/cmdliner/releases/cmdliner-${version}.tbz";
+    hash =
+      {
+        "1.0.4" = "sha256-XCqT1Er4o4mWosD4D715cP5HUfEEvkcMr6BpNT/ABMA=";
+        "1.3.0" = "sha256-joGA9XO0QPanqMII2rLK5KgjhP7HMtInhNG7bmQWjLs=";
+      }
+      ."${version}";
   };
 
   nativeBuildInputs = [ ocaml ];
@@ -19,11 +25,11 @@ stdenv.mkDerivation rec {
   makeFlags = [ "PREFIX=$(out)" ];
   installTargets = "install install-doc";
   installFlags = [
-    "LIBDIR=$(out)/lib/ocaml/${ocaml.version}/site-lib/${pname}"
-    "DOCDIR=$(out)/share/doc/${pname}"
+    "LIBDIR=$(out)/lib/ocaml/${ocaml.version}/site-lib/cmdliner"
+    "DOCDIR=$(out)/share/doc/cmdliner"
   ];
   postInstall = ''
-    mv $out/lib/ocaml/${ocaml.version}/site-lib/${pname}/{opam,${pname}.opam}
+    mv $out/lib/ocaml/${ocaml.version}/site-lib/cmdliner/{opam,cmdliner.opam}
   '';
 
   meta = {
@@ -32,6 +38,5 @@ stdenv.mkDerivation rec {
     license = lib.licenses.isc;
     inherit (ocaml.meta) platforms;
     maintainers = [ lib.maintainers.vbgl ];
-    broken = !(lib.versionAtLeast ocaml.version "4.03");
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocamlformat/generic.nix b/pkgs/development/ocaml-modules/ocamlformat/generic.nix
index d4f2f3336fe8..e59d117413e0 100644
--- a/pkgs/development/ocaml-modules/ocamlformat/generic.nix
+++ b/pkgs/development/ocaml-modules/ocamlformat/generic.nix
@@ -6,7 +6,7 @@
   base,
   camlp-streams,
   cmdliner_1_0,
-  cmdliner_1_1,
+  cmdliner_1,
   csexp,
   dune-build-info,
   either,
@@ -65,7 +65,7 @@ rec {
         "0.9.0";
   };
 
-  cmdliner_v = if lib.versionAtLeast version "0.21.0" then cmdliner_1_1 else cmdliner_1_0;
+  cmdliner_v = if lib.versionAtLeast version "0.21.0" then cmdliner_1 else cmdliner_1_0;
 
   library_deps = [
     base
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 8542c13c2767..ba38de552496 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -244,13 +244,11 @@ let
 
         cmarkit = callPackage ../development/ocaml-modules/cmarkit { };
 
-        # The 1.1.0 release broke a lot of packages and is not compatible with
-        # OCaml < 4.08.
-        cmdliner = if lib.versionAtLeast ocaml.version "4.08" then cmdliner_1_1 else cmdliner_1_0;
+        cmdliner = callPackage ../development/ocaml-modules/cmdliner { };
 
-        cmdliner_1_0 = callPackage ../development/ocaml-modules/cmdliner/1_0.nix { };
+        cmdliner_1_0 = cmdliner.override { version = "1.0.4"; };
 
-        cmdliner_1_1 = callPackage ../development/ocaml-modules/cmdliner/1_1.nix { };
+        cmdliner_1 = cmdliner.override { version = "1.3.0"; };
 
         cohttp = callPackage ../development/ocaml-modules/cohttp { };
 
@@ -2317,6 +2315,7 @@ let
       // lib.optionalAttrs config.allowAliases {
         biocaml = throw "biocaml has been removed"; # 2025-06-04
         chacha = throw "chacha has been removed because it has been marked as broken since at least November 2024. It is now vendored inside mirage-crypto, consider using that instead."; # Added 2025-10-11
+        cmdliner_1_1 = cmdliner_1; # Added 2026-01-28
         dune_2 = pkgs.dune_2; # Added 2025-12-08
         dune_3 = pkgs.dune_3; # Added 2025-12-08
         gd4o = throw "ocamlPackages.gd4o is not maintained, use ocamlPackages.gd instead";