diff --git a/pkgs/top-level/release-outpaths.nix b/pkgs/top-level/release-outpaths.nix
index dcf462a6b6a6..fa2eb12d9e77 100644
--- a/pkgs/top-level/release-outpaths.nix
+++ b/pkgs/top-level/release-outpaths.nix
@@ -9,6 +9,15 @@
 
 # used by pkgs/top-level/release-attrnames-superset.nix
 , attrNamesOnly ? false
+
+# Set this to `null` to build for builtins.currentSystem only
+, systems ? [
+    "aarch64-linux"
+    "aarch64-darwin"
+    #"i686-linux"  # !!!
+    "x86_64-linux"
+    "x86_64-darwin"
+  ]
 }:
 let
   lib = import (path + "/lib");
@@ -16,14 +25,10 @@ let
     # Compromise: accuracy vs. resources needed for evaluation.
     {
       inherit attrNamesOnly;
-      supportedSystems = [
-        "aarch64-linux"
-        "aarch64-darwin"
-        #"i686-linux"  # !!!
-        "x86_64-linux"
-        "x86_64-darwin"
-      ];
-
+      supportedSystems =
+        if systems == null
+        then [ builtins.currentSystem ]
+        else systems;
       nixpkgsArgs = {
         config = {
           allowAliases = false;