diff --git a/Buildscripts/release-sdk.sh b/Buildscripts/release-sdk.sh
index df469c5e..501f09c7 100755
--- a/Buildscripts/release-sdk.sh
+++ b/Buildscripts/release-sdk.sh
@@ -46,4 +46,4 @@ cp Libraries/elf_loader/license.txt $elf_loader_library_path/
 
 cp Buildscripts/CMake/TactilitySDK.cmake $target_path/
 cp Buildscripts/CMake/CMakeLists.txt $target_path/
-echo -n $ESP_IDF_VERSION >> $target_path/idf-version.txt
+printf '%s' "$ESP_IDF_VERSION" >> $target_path/idf-version.txt
diff --git a/ExternalApps/HelloWorld/build.sh b/ExternalApps/HelloWorld/build.sh
index 3fd745ac..a2f0b9ff 100755
--- a/ExternalApps/HelloWorld/build.sh
+++ b/ExternalApps/HelloWorld/build.sh
@@ -1,4 +1,6 @@
 rm sdkconfig
 cp ../../sdkconfig sdkconfig
 cat sdkconfig.override >> sdkconfig
-idf.py elf_app
+# First we must run "build" because otherwise "idf.py elf" is not a valid command
+idf.py build
+idf.py elf