diff --git a/conf/common/build.yml b/conf/common/build.yml
index 9b3cedb6b7ac1935b9c03cac1b92ab16593b8fe8..4b95d6a09172555831a48e6f3c7c48f2abe6d2fb 100644
--- a/conf/common/build.yml
+++ b/conf/common/build.yml
@@ -9,11 +9,11 @@ spack:
   root: "%HPCROOTDIR%/spack" # path to a spack install, will be downloaded to if not present
   user_cache_path: "%HPCROOTDIR%/spack_user_cache_path" # spack puts data here when bootstrapping, leave empty to use home folder
   user_config_path: "%HPCROOTDIR%/spack_user_config_path" # spack puts data here when bootstrapping, leave empty to use home folder
-  disable_local_config: true # if false, spack install into home folder
+  disable_local_config: false # if true, spack installs into spack source dir
 
 icon:
   build_cmd: "icon-nwp@%ICON.VERSION%% %SPACK.COMPILER% target=x86_64_v2 ^openmpi+pmi+legacylaunchers schedulers=slurm fabrics=ucx ucx+dc+dm+ib_hw_tm+mlx5_dv+rc+rdmacm+thread_multiple+ud+verbs"
-  version: 2.6.5-nwp0
+  version: master
 
 python_environment:
   # Name of the virtual environment in the remote platform experiment folder