diff --git a/boards/common/slwstk6000b/Makefile.features b/boards/common/slwstk6000b/Makefile.features
index 031f30d249..c283226995 100644
--- a/boards/common/slwstk6000b/Makefile.features
+++ b/boards/common/slwstk6000b/Makefile.features
@@ -1,5 +1,5 @@
 CPU = efm32
-# TODO move CPU_MODEL here
+# TODO move CPU_MODEL here based on the daughter board
 
 # Put defined MCU peripherals here (in alphabetical order)
 FEATURES_PROVIDED += periph_adc
diff --git a/boards/common/slwstk6000b/Makefile.include b/boards/common/slwstk6000b/Makefile.include
index 1070acdb89..e511c7de3c 100644
--- a/boards/common/slwstk6000b/Makefile.include
+++ b/boards/common/slwstk6000b/Makefile.include
@@ -4,8 +4,6 @@ INCLUDES += -I$(RIOTBOARD)/common/slwstk6000b/include
 # add module specific includes
 INCLUDES += -I$(RIOTBOARD)/common/slwstk6000b/modules/$(BOARD_MODULE)/include
 
-export CPU_MODEL = $(MODULE_CPU)
-
 # set default port depending on operating system
 PORT_LINUX ?= /dev/ttyACM0
 PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
diff --git a/boards/slwstk6000b-slwrb4150a/Makefile.features b/boards/slwstk6000b-slwrb4150a/Makefile.features
index a9759a3c88..50a9307d14 100644
--- a/boards/slwstk6000b-slwrb4150a/Makefile.features
+++ b/boards/slwstk6000b-slwrb4150a/Makefile.features
@@ -1 +1,3 @@
+# HACK this should be deduced from the daughter board in 'common/slwstk6000b'
+CPU_MODEL = efr32mg1p233f256gm48
 include $(RIOTBOARD)/common/slwstk6000b/Makefile.features
diff --git a/boards/slwstk6000b-slwrb4162a/Makefile.features b/boards/slwstk6000b-slwrb4162a/Makefile.features
index a9759a3c88..5667afc2fb 100644
--- a/boards/slwstk6000b-slwrb4162a/Makefile.features
+++ b/boards/slwstk6000b-slwrb4162a/Makefile.features
@@ -1 +1,3 @@
+# HACK this should be deduced from the daughter board in 'common/slwstk6000b'
+CPU_MODEL = efr32mg12p332f1024gl125
 include $(RIOTBOARD)/common/slwstk6000b/Makefile.features
diff --git a/dist/tools/buildsystem_sanity_check/check.sh b/dist/tools/buildsystem_sanity_check/check.sh
index 6c2c53abec..dc6d23f5b0 100755
--- a/dist/tools/buildsystem_sanity_check/check.sh
+++ b/dist/tools/buildsystem_sanity_check/check.sh
@@ -155,9 +155,6 @@ check_cpu_cpu_model_defined_in_makefile_features() {
     pathspec+=(':!boards/**/Makefile.features')
     pathspec+=(':!cpu/**/Makefile.features')
 
-    # Currently blacklist this non migrated file for CPU_MODEL
-    pathspec+=(':!boards/common/slwstk6000b/Makefile.include')
-
     git -C "${RIOTBASE}" grep "${patterns[@]}" -- "${pathspec[@]}" \
             | error_with_message 'CPU and CPU_MODEL definition must be done by board/BOARD/Makefile.features, board/common/**/Makefile.features or cpu/CPU/Makefile.features'
 }