diff --git a/pkgs/development/python-modules/conda-libmamba-solver/default.nix b/pkgs/development/python-modules/conda-libmamba-solver/default.nix
index 572e43207050..26b6e17c0f44 100644
--- a/pkgs/development/python-modules/conda-libmamba-solver/default.nix
+++ b/pkgs/development/python-modules/conda-libmamba-solver/default.nix
@@ -2,14 +2,13 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  libmambapy,
   hatchling,
   hatch-vcs,
   boltons,
 }:
 buildPythonPackage rec {
   pname = "conda-libmamba-solver";
-  version = "25.3.0";
+  version = "25.4.0";
   pyproject = true;
 
   src = fetchFromGitHub {
@@ -17,7 +16,7 @@ buildPythonPackage rec {
     owner = "conda";
     repo = "conda-libmamba-solver";
     tag = version;
-    hash = "sha256-7iWrvh82MOkj1tgR0M8mdv8NLGckI4fxIV4rl1DI4w0=";
+    hash = "sha256-DnRy5ntSjKADeHbqvLJz62WlLbM94U7urZLJg+Tpqbw=";
   };
 
   build-system = [
@@ -27,7 +26,6 @@ buildPythonPackage rec {
 
   dependencies = [
     boltons
-    libmambapy
   ];
 
   # this package depends on conda for the import to run successfully, but conda depends on this package to execute.