diff --git a/flake.nix b/flake.nix
index 9c84bef..23b36fc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -36,6 +36,10 @@
           PKG_CONFIG_PATH = "${pkgs.libjpeg_turbo.dev}/lib/pkgconfig";
           LD_LIBRARY_PATH = "${pkgs.libjpeg_turbo.out}/lib";
 
+          # Nix's libspa-0.2.pc emits -fno-strict-aliasing/-fno-strict-overflow
+          # which Go's cgo rejects unless explicitly allowed.
+          CGO_CFLAGS_ALLOW = "-fno-strict-overflow|-fno-strict-aliasing";
+
           shellHook = ''
             echo "TeleportFling dev shell ready!"
           '';