diff --git a/timeshift.spec b/timeshift.spec
index 82a4b89..7ea3143 100644
--- a/timeshift.spec
+++ b/timeshift.spec
@@ -8,7 +8,7 @@
 
 Name:           timeshift
 Version:        18.1.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        System restore tool for Linux
 
 License:        GPLv3+ or LGPLv3+
@@ -60,8 +60,21 @@ sed -i 's|-X -Wl,-rpath,/usr/share/${app_name}/libs||' src/makefile
 for flag in %{optflags} %{?__global_ldflags}; do
   VALAFLAGS="$VALAFLAGS -X $flag"
 done
+
+# Inject Fedora compiler flags and the debug option to valac.
+# Just dump the c-sources.
+sed -i "s|valac|& --ccode --save-temps -g $VALAFLAGS|" src/makefile
+%make_build
+
+# Move generated c-sources into flat tree so it can be picked
+# up for -debugsource.
+for f in `find src/ -type f -name '*.c'`; do
+  mv -f $f src/
+done
+
 # Inject Fedora compiler flags and the debug option to valac
-sed -i "s|valac|valac --save-temps -g $VALAFLAGS|" src/makefile
+# Build the binaries.
+sed -i "s|valac --ccode|valac|" src/makefile
 %make_build
 
 
@@ -109,6 +122,9 @@ fi
 
 
 %changelog
+* Sun Jan 28 2018 Björn Esser <besser82@fedoraproject.org> - 18.1.1-4
+- Generate useful -debugsource package
+
 * Sun Jan 28 2018 Björn Esser <besser82@fedoraproject.org> - 18.1.1-3
 - Properly apply system LDFLAGS and thus enable full hardening