bmake: cmd-interrupt test tries to `SIGINT` make itself, is flaky as a result (#439193)

pkgs/by-name/bm/bmake/package.nix

···
   ];
 
   # Disabled tests:
+  # * cmd-interrupt: tries to `SIGINT` make itself, flaky as a result
   # * directive-export{,-gmake}: another failure related to TZ variables
   # * opt-keep-going-indirect: not yet known
-  # * varmod-localtime: musl doesn't support TZDIR and this test relies on
-  #   impure, implicit paths
-  # * interrupt-compat (fails on x86_64-linux building for i686-linux)
-  env.BROKEN_TESTS = lib.concatStringsSep " " (
-    [
-      "directive-export"
-      "directive-export-gmake"
-      "opt-keep-going-indirect"
-      "varmod-localtime"
-    ]
-    ++ lib.optionals stdenv.targetPlatform.is32bit [
-      "interrupt-compat"
-    ]
-  );
+  # * varmod-localtime: musl doesn't support TZDIR and this test relies on impure, implicit paths
+  env.BROKEN_TESTS = lib.concatStringsSep " " [
+    "cmd-interrupt"
+    "directive-export"
+    "directive-export-gmake"
+    "opt-keep-going-indirect"
+    "varmod-localtime"
+  ];
 
   strictDeps = true;