diff --git a/pkgs/by-name/ca/cadical/package.nix b/pkgs/by-name/ca/cadical/package.nix
index 76fd676fba51..fde53b371fb5 100644
--- a/pkgs/by-name/ca/cadical/package.nix
+++ b/pkgs/by-name/ca/cadical/package.nix
@@ -58,9 +58,15 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   # fix static build
-  postPatch = ''
-    substituteInPlace makefile.in --replace-fail "ar rc" '$(AR) rc'
-  '';
+  postPatch =
+    ''
+      substituteInPlace makefile.in --replace-fail "ar rc" '$(AR) rc'
+    ''
+    # Racy/flaky tests that sometimes spontaneously combust on darwin.
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && (lib.versionAtLeast version "2.1.1")) ''
+      substituteInPlace test/api/run.sh --replace-fail 'run parcompwrite' ""
+      substituteInPlace test/api/run.sh --replace-fail 'run example_tracer' ""
+    '';
 
   # the configure script is not generated by autotools and does not accept the
   # arguments that the default configurePhase passes like --prefix and --libdir