diff --git a/.github/workflows/mkosi.yml b/.github/workflows/mkosi.yml
index 28b2829bbd..58421589ea 100644
--- a/.github/workflows/mkosi.yml
+++ b/.github/workflows/mkosi.yml
@@ -159,8 +159,6 @@ jobs:
 
         [Host]
         QemuMem=4G
-        # We build with debuginfo so there's no point in mounting the sources into the machine.
-        RuntimeBuildSources=no
         EOF
 
     - name: Generate secure boot key
diff --git a/docs/HACKING.md b/docs/HACKING.md
index 2e964f4178..b17875f62c 100644
--- a/docs/HACKING.md
+++ b/docs/HACKING.md
@@ -63,21 +63,10 @@ ToolsTree=default
 ```
 
 Every time you rerun the `mkosi` command a fresh image is built, incorporating
-all current changes you made to the project tree. To avoid having to build a new
-image all the time when iterating on a patch, add the following to
-`mkosi.local.conf`:
-
-```conf
-[Host]
-RuntimeBuildSources=yes
-```
-
-After enabling this setting, the source and build directories will be mounted to
-`/work/src` and `/work/build` respectively when booting the image as a container
-or virtual machine. To build the latest changes and re-install after booting the
-image, run one of the following commands in another terminal on your host (
-choose the right one depending on the distribution of the container or virtual
-machine):
+all current changes you made to the project tree. To build the latest changes
+and re-install after booting the image, run one of the following commands in
+another terminal on your host (choose the right one depending on the
+distribution of the container or virtual machine):
 
 ```sh
 mkosi -t none && mkosi ssh dnf upgrade --disablerepo="*" "/work/build/*.rpm" # CentOS/Fedora
diff --git a/test/integration-test-wrapper.py b/test/integration-test-wrapper.py
index d7a622abe8..596761aa89 100755
--- a/test/integration-test-wrapper.py
+++ b/test/integration-test-wrapper.py
@@ -154,6 +154,7 @@ def main():
             ),
         ]),
         '--credential', f"journal.storage={'persistent' if sys.stderr.isatty() else args.storage}",
+        *(['--runtime-build-sources=no'] if not sys.stderr.isatty() else []),
         'qemu' if args.vm or os.getuid() != 0 else 'boot',
     ]