diff --git a/pkgs/tools/video/atomicparsley/default.nix b/pkgs/tools/video/atomicparsley/default.nix
index 74f4c562102c..f0ad4297c003 100644
--- a/pkgs/tools/video/atomicparsley/default.nix
+++ b/pkgs/tools/video/atomicparsley/default.nix
@@ -18,6 +18,12 @@ stdenv.mkDerivation rec {
       cf-private
     ];
 
+  configureFlags = stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    # AC_FUNC_MALLOC is broken on cross builds.
+    "ac_cv_func_malloc_0_nonnull=yes"
+    "ac_cv_func_realloc_0_nonnull=yes"
+  ];
+
   installPhase = "install -D AtomicParsley $out/bin/AtomicParsley";
 
   meta = with stdenv.lib; {