Use debhelper-compat 12

debian/changelog

@@ -7,6 +7,9 @@ ostree (2019.2-2) UNRELEASED; urgency=medium
       can't reproduce and debug the failure in a local Docker container.
     - Similarly, disable the autopkgtest for now.
   * Standards-Version: 4.4.0 (no changes required)
+  * Use debhelper-compat 12
+    - Override dh_installsystemd instead of dh_systemd_start
+    - Stop overriding libexecdir
 
  -- Simon McVittie <smcv@debian.org>  Sun, 23 Jun 2019 20:07:33 +0100
 

debian/compat

@@ -1 +0,0 @@
-10

debian/control

@@ -13,7 +13,7 @@ Build-Depends:
  bison,
  ca-certificates,
  cpio,
- debhelper (>= 10~),
+ debhelper-compat (= 12),
  dh-exec (>= 0.23~),
  docbook-xml <!nodoc>,
  docbook-xsl <!nodoc>,

debian/rules

@@ -14,7 +14,6 @@ override_dh_autoreconf:
 configure_options = \
 	GJS=some-nonexistent-gjs-binary \
 	--enable-installed-tests \
-	--libexecdir='$${prefix}/libexec' \
 	--with-avahi \
 	--with-dracut \
 	--with-grub2 \
@@ -99,5 +98,5 @@ override_dh_fixperms-arch:
 	find debian/tmp -type f -name '*.js' -print0 | \
 		xargs -0r chmod -v go=rX,u+rw,a-s
 
-override_dh_systemd_start:
-	dh_systemd_start --no-start
+override_dh_installsystemd:
+	dh_installsystemd --no-start