diff --git a/conda/setup-environment.cmd b/conda/setup-environment.cmd
index 24c7610850..dd51d7c739 100644
--- a/conda/setup-environment.cmd
+++ b/conda/setup-environment.cmd
@@ -7,4 +7,4 @@ call conda config --add envs_dirs %CD%/.conda
 call conda config --set env_prompt "({name})"
 
 :: install the FreeCAD dependencies into the environment
-call mamba run --live-stream -n freecad mamba-devenv -f conda/environment.devenv.yml
+call mamba run --live-stream -n freecad mamba-devenv --no-prune -f conda/environment.devenv.yml
diff --git a/conda/setup-environment.sh b/conda/setup-environment.sh
index c667e2dbf3..bd75d76602 100755
--- a/conda/setup-environment.sh
+++ b/conda/setup-environment.sh
@@ -9,4 +9,4 @@ conda config --add envs_dirs $(pwd)/.conda
 conda config --set env_prompt "({name})"
 
 # install the FreeCAD dependencies into the environment
-mamba run --live-stream -n freecad mamba-devenv -f conda/environment.devenv.yml
+mamba run --live-stream -n freecad mamba-devenv --no-prune -f conda/environment.devenv.yml