diff --git a/fedora-gnat-project-common.spec b/fedora-gnat-project-common.spec
index 8e3b8a0..9595a6c 100644
--- a/fedora-gnat-project-common.spec
+++ b/fedora-gnat-project-common.spec
@@ -1,6 +1,6 @@
 Name:           fedora-gnat-project-common
 Version:        3.14
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Files shared by Ada libraries
 Summary(sv):    Gemensamma filer för adabibliotek
 
@@ -59,6 +59,9 @@ cp -p macros.gnat %{buildroot}%{rpmmacrodir}/
 
 
 %changelog
+* Wed Dec  2 2020 Pavel Zhukov <pzhukov@redhat.com> - 3.14-3
+- Add flags for gprinstall into macros.gnat
+
 * Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.14-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
 
diff --git a/macros.gnat.in b/macros.gnat.in
index c215aa0..49a889b 100644
--- a/macros.gnat.in
+++ b/macros.gnat.in
@@ -81,3 +81,13 @@
 # Comfignat. It passes the standard parameters for the build tools, the
 # directories project and the installation pathnames to Make. A goal for Make
 # may be appended on the command line.
+
+%Gpr_install_flags -p --sources-subdir=%{buildroot}/%{_includedir}/%{name} \\\
+                      --project-subdir=%{buildroot}/%_GNAT_project_dir \\\
+                      --exec-subdir=%{buildroot}/%{_bindir} \\\
+                      --ali-subdir=%{buildroot}/%{_libdir}/%{name} \\\
+                      --lib-subdir=%{buildroot}/%{_libdir} \\\
+                      --link-lib-subdir=%{buildroot}/%{_libdir} 
+
+# Gprinstall_flags contains standard path for package installation is Fedora
+# It deprecates usage of directories in case if project uses gprinstall properly