diff --git a/ios/engine/build.sh b/ios/engine/build.sh
index e0d62385f6..5a0a2a105c 100755
--- a/ios/engine/build.sh
+++ b/ios/engine/build.sh
@@ -37,7 +37,7 @@ builder_describe_outputs \
   build         /ios/build/Build/Products/Release/KeymanEngine.xcframework
 
 # Base definitions (must be before do_clean call)
-DERIVED_DATA=build
+DERIVED_DATA="$KEYMAN_ROOT/ios/build"
 BUILD_PATH=$DERIVED_DATA/Build/Products
 
 # Extended path definitions
diff --git a/ios/keyman/build.sh b/ios/keyman/build.sh
index 95d38ad14a..ede1fd436e 100755
--- a/ios/keyman/build.sh
+++ b/ios/keyman/build.sh
@@ -35,7 +35,7 @@ builder_describe_outputs \
   build     /ios/build/Build/Products/Release-iphoneos/Keyman.xcarchive
 
 # Base definitions (must be before do_clean call)
-DERIVED_DATA=build
+DERIVED_DATA="$KEYMAN_ROOT/ios/build"
 BUILD_PATH=$DERIVED_DATA/Build/Products
 
 # Needed before `configure` action