diff --git a/.ci/build-kit/compile.sh b/.ci/build-kit/compile.sh
index 95e0259b2..e8c428b7b 100755
--- a/.ci/build-kit/compile.sh
+++ b/.ci/build-kit/compile.sh
@@ -9,4 +9,4 @@ cmake \
     -DCMAKE_INSTALL_PREFIX="$EXT_MOUNT/dist" \
     -DBUILD_TESTING=ON
 
-ninja -j$(nproc) -C build
+ninja -j$(nproc) -C "$EXT_MOUNT/build"
diff --git a/.ci/build-kit/prepare_integration_tests.sh b/.ci/build-kit/prepare_integration_tests.sh
index 7e19aaf95..7e5929011 100755
--- a/.ci/build-kit/prepare_integration_tests.sh
+++ b/.ci/build-kit/prepare_integration_tests.sh
@@ -1,11 +1,11 @@
 #!/bin/sh
 
 # ninja -j$(nproc) -C build tests
-ninja -j$(nproc) -C build install
+ninja -j$(nproc) -C "$EXT_MOUNT/build" install
 
 # install everest testing by cmake target to make sure using the version defined in dependencies.yaml
-ninja -C build install_everest_testing
+ninja -C "$EXT_MOUNT/build" install_everest_testing
 
 rsync -a "$EXT_MOUNT/source/tests" ./
 
-rm -rf build
+rm -rf "$EXT_MOUNT/build"
diff --git a/.ci/build-kit/run_unit_tests.sh b/.ci/build-kit/run_unit_tests.sh
index 5283d4420..4ef1cdc00 100755
--- a/.ci/build-kit/run_unit_tests.sh
+++ b/.ci/build-kit/run_unit_tests.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-ninja -j$(nproc) -C build test
+ninja -j$(nproc) -C "$EXT_MOUNT/build" test