diff --git a/mkosi.images/system/mkosi.conf.d/10-centos-fedora/mkosi.build.chroot b/mkosi.images/system/mkosi.conf.d/10-centos-fedora/mkosi.build.chroot
index e2d20d4b87..bb6854c38f 100755
--- a/mkosi.images/system/mkosi.conf.d/10-centos-fedora/mkosi.build.chroot
+++ b/mkosi.images/system/mkosi.conf.d/10-centos-fedora/mkosi.build.chroot
@@ -24,6 +24,18 @@ tee --append /usr/lib/rpm/redhat/macros <<'EOF'
 %{nil}
 EOF
 
+VERSION="$(cat meson.version)"
+RELEASE="$(date "+%Y%m%d%H%M%S" --date "@$TS")"
+
+DIST="$(rpm --eval %dist)"
+ARCH="$(rpm --eval %_arch)"
+SRCDEST="/usr/src/debug/systemd-$VERSION-${RELEASE}${DIST}.$ARCH"
+
+EXTRA_CFLAGS="-Og"
+if ((WITH_DEBUG)); then
+    EXTRA_CFLAGS="$EXTRA_CFLAGS -ffile-prefix-map=../src=$SRCDEST"
+fi
+
 IFS=
 # TODO: Replace meson_build and meson_install overrides with "--undefine __meson_verbose" once
 # https://github.com/mesonbuild/meson/pull/12835 is available.
@@ -43,9 +55,9 @@ rpmbuild \
     --define "_binary_payload w.ufdio" \
     $( ((WITH_DEBUG)) || echo --define) \
     $( ((WITH_DEBUG)) || echo "debug_package %{nil}") \
-    --define "version_override $(cat meson.version)" \
-    --define "release_override $(date "+%Y%m%d%H%M%S" --date "@$TS")" \
-    --define "_distro_extra_cflags -Og" \
+    --define "version_override $VERSION" \
+    --define "release_override $RELEASE" \
+    --define "_distro_extra_cflags $EXTRA_CFLAGS" \
     --define "meson_build %{shrink:%{__meson} compile -C %{_vpath_builddir} -j %{_smp_build_ncpus} %{nil}}" \
     --define "meson_install %{shrink:DESTDIR=%{buildroot} %{__meson} install -C %{_vpath_builddir} --no-rebuild --quiet %{nil}}" \
     --define "meson_extra_configure_options -D mode=developer -D b_sanitize=${SANITIZERS:-none}" \