diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c6693b0..70db1c5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,6 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         node: [feedc0de, comred]
     steps:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc32b4d..3d9b204 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,23 @@
 cmake_minimum_required(VERSION 3.16.3)
 
+if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/sdkconfig)
+    message(FATAL_ERROR "sdkconfig not found (please run ./switchconf.sh)")
+endif()
+
+if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/config.cmake)
+    message(FATAL_ERROR "config.cmake not found (please run ./switchconf.sh)")
+endif()
+
+file(READ_SYMLINK ${CMAKE_CURRENT_SOURCE_DIR}/sdkconfig result)
+if (result STREQUAL "")
+    message(FATAL_ERROR "sdkconfig is not a symlink (please run ./switchconf.sh)")
+endif()
+
+file(READ_SYMLINK ${CMAKE_CURRENT_SOURCE_DIR}/config.cmake result)
+if (result STREQUAL "")
+    message(FATAL_ERROR "config.cmake is not a symlink (please run ./switchconf.sh)")
+endif()
+
 include(config.cmake)
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
@@ -8,3 +26,14 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 project(${BOBBY_APP_NAME})
+
+set(expected_build_folder "${CMAKE_CURRENT_SOURCE_DIR}/build")
+file(READ_SYMLINK "${expected_build_folder}" expected_build_folder_resolved)
+if(NOT IS_ABSOLUTE "${expected_build_folder_resolved}")
+  get_filename_component(dir "${linkname}" DIRECTORY)
+  set(expected_build_folder_resolved "${dir}/${expected_build_folder_resolved}")
+endif()
+
+if (NOT PROJECT_BINARY_DIR STREQUAL "${expected_build_folder}" AND NOT PROJECT_BINARY_DIR STREQUAL "${expected_build_folder_resolved}")
+    message(FATAL_ERROR "building in ${PROJECT_BINARY_DIR} is not supported, you have to build in ${expected_build_folder} or ${expected_build_folder_resolved} (please run ./switchconf.sh)")
+endif()
diff --git a/switchconf.sh b/switchconf.sh
index e03a068..5a028fb 100755
--- a/switchconf.sh
+++ b/switchconf.sh
@@ -1,6 +1,12 @@
 #!/bin/bash
 
-VALID_CONFIGS=(feedc0de comred mick peter greyhash)
+VALID_CONFIGS=(
+    "feedc0de"
+    "comred"
+    "mick"
+    "peter"
+    "greyhash"
+)
 
 print_usage() {
     echo "usage: ./switchconf.sh ${VALID_CONFIGS[@]}"