diff --git a/conda/environment.devenv.yml b/conda/environment.devenv.yml
index aa2b3e2b7d..1a74006ae1 100644
--- a/conda/environment.devenv.yml
+++ b/conda/environment.devenv.yml
@@ -60,6 +60,7 @@ dependencies:
 - cmake
 - coin3d
 - compilers
+- conda
 - conda-build
 - conda-devenv
 - conda-smithy
@@ -72,6 +73,7 @@ dependencies:
 - graphviz
 - hdf5
 - libcxx
+- mamba==1.4.9
 - matplotlib
 - ninja
 - numpy
@@ -96,4 +98,4 @@ dependencies:
 - vtk
 - xerces-c
 - yaml-cpp
-- zlib
\ No newline at end of file
+- zlib