diff --git a/pkgs/development/libraries/physics/fastnlo/default.nix b/pkgs/development/libraries/physics/fastnlo_toolkit/default.nix
similarity index 100%
rename from pkgs/development/libraries/physics/fastnlo/default.nix
rename to pkgs/development/libraries/physics/fastnlo_toolkit/default.nix
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 999c26e320b..4e3ef580344 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -193,6 +193,7 @@ mapAliases ({
   exfat-utils = exfat;                  # 2015-09-11
   facette = throw "facette has been removed."; # added 2020-01-06
   fast-neural-doodle = throw "fast-neural-doodle has been removed, as the upstream project has been abandoned"; # added 2020-03-28
+  fastnlo = fastnlo_toolkit; # added 2021-04-24
   fedora-coreos-config-transpiler = throw "fedora-coreos-config-transpiler has been renamed to 'butane'."; # added 2021-04-13
   fetchFromGithub = throw "You meant fetchFromGitHub, with a capital H.";
   ffadoFull = ffado; # added 2018-05-01
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 76c68e6b395..e0aef466b09 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -29550,7 +29550,7 @@ in
 
   fastjet-contrib = callPackage ../development/libraries/physics/fastjet-contrib { };
 
-  fastnlo = callPackage ../development/libraries/physics/fastnlo { };
+  fastnlo_toolkit = callPackage ../development/libraries/physics/fastnlo_toolkit { };
 
   geant4 = libsForQt5.callPackage ../development/libraries/physics/geant4 { };