Delete -g flag from install section of Makefile. We cannot change group to cron or to root in install

.gear/systemd-crontab-generator.spec

@@ -14,6 +14,7 @@ BuildArch: x86_64
 Source0: %name-%version.tar
 Patch0: %name-%version-%release.patch
 Patch1: allow_deprecated_rustc-serialize.patch
+Patch2: makefile_install_fix.patch
 
 BuildRequires: /proc
 BuildRequires: rust-cargo
@@ -32,6 +33,7 @@ It's intended to be a drop-in replacement for all cron implementations.
 %setup
 %patch0 -p1 
 %patch1 -p1 
+%patch2 -p1 
 
 %build
 ./configure

makefile_install_fix.patch

@@ -0,0 +1,13 @@
+diff --git a/Makefile.in b/Makefile.in
+index ac1ed07..c0177a5 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -73,7 +73,7 @@ build: all
+ 	    --features "$(foreach schedule,$(schedules),sched-$(schedule)) $(persistent) $(randomized_delay)"
+ 
+ install: build
+-	install -m2755 -g `getent group cron || echo root` $(strip) -D $(builddir)/bin/crontab $(DESTDIR)$(bindir)/crontab
++	install -m2755 -D $(builddir)/bin/crontab $(DESTDIR)$(bindir)/crontab
+ 	install -m755 $(strip) -D $(builddir)/bin/systemd-crontab-generator $(DESTDIR)$(libdir)/systemd/system-generators/systemd-crontab-generator
+ 	install -m755 $(strip) -D $(builddir)/bin/remove-stale-stamps $(DESTDIR)$(libdir)/$(packagedir)/remove-stale-stamps
+ 	install -m755 $(strip) -D $(builddir)/bin/mail-on-failure $(DESTDIR)$(libdir)/$(packagedir)/mail-on-failure