diff --git a/SPECS/dotnet-build-reference-packages.spec b/SPECS/dotnet-build-reference-packages.spec
index 8aa88c0..d69b52d 100644
--- a/SPECS/dotnet-build-reference-packages.spec
+++ b/SPECS/dotnet-build-reference-packages.spec
@@ -5,7 +5,7 @@
 
 Name:           dotnet-build-reference-packages
 Version:        0
-Release:        9.20200608git%{shortcommit}%{?dist}
+Release:        10.20200608git%{shortcommit}%{?dist}
 Summary:        Reference packages needed by the .NET Core SDK build
 
 License:        MIT
@@ -21,6 +21,12 @@ ExclusiveArch:  x86_64
 BuildRequires:  dotnet-sdk-3.1
 BuildRequires:  dotnet-sdk-3.1-source-built-artifacts
 
+# The files of dotnet5.0-build-reference-packages and this package
+# conflict. They install to the same location and cointain a shared
+# (sub)set of files. These packages aren't really meant to be used by
+# end-users and a single .NET build will not require both.
+Conflicts:      dotnet5.0-build-reference-packages
+
 %description
 This contains references packages used for building .NET Core.
 
@@ -62,6 +68,10 @@ cp -a Private.SourceBuild.ReferencePackages.%{version}.tar.gz %{buildroot}/%{_li
 
 
 %changelog
+* Wed Jun 09 2021 Omair Majid <omajid@redhat.com> - 0-10.20200608gitcd5a8c6
+- Add Conflicts for dotnet5.0-build-reference-packages
+- Resolves: RHBZ#1949264
+
 * Wed May 26 2021 Omair Majid <omajid@redhat.com> - 0-9.20200608gitcd5a8c6
 - Add gating tests