diff --git a/flake.nix b/flake.nix
index 00f6a1464..9574993b1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -78,6 +78,7 @@
                 "--extra-lib-dirs=${stripDylib (ncurses-static)}/lib"
               ] ++ (if stdenv.hostPlatform.isDarwin then [
                 "--extra-lib-dirs=${stripDylib (libiconv.override { enableStatic = true; })}/lib"
+                "--extra-lib-dirs=${stripDylib (libcxxabi)}/lib"
               ] else [])))
             (haskell.lib.compose.enableCabalFlag "static")
           ];
@@ -97,22 +98,28 @@
         in if pkgs.stdenv.isLinux
         then pkgs.runCommand "echidna-stripNixRefs" {} ''
           mkdir -p $out/bin
-          cp ${pkgs.haskell.lib.dontCheck echidna-static}/bin/echidna $out/bin/
+          cp ${pkgsStatic.haskell.lib.dontCheck echidna-static}/bin/echidna $out/bin/
           # fix TERMINFO path in ncurses
           ${perl} -i -pe 's#(${ncurses-static}/share/terminfo)#"/usr/share/terminfo" . "\x0" x (length($1) - 19)#e' $out/bin/echidna
           chmod 555 $out/bin/echidna
         '' else pkgs.runCommand "echidna-stripNixRefs" {} ''
           mkdir -p $out/bin
-          cp ${pkgs.haskell.lib.dontCheck echidna-static}/bin/echidna $out/bin/
+          cp ${pkgsStatic.haskell.lib.dontCheck echidna-static}/bin/echidna $out/bin/
           # get the list of dynamic libs from otool and tidy the output
           libs=$(${otool} -L $out/bin/echidna | tail -n +2 | sed 's/^[[:space:]]*//' | cut -d' ' -f1)
           # get the path for libcxx
-          cxx=$(echo "$libs" | ${grep} '^/nix/store/.*-libcxx')
+          cxx=$(echo "$libs" | ${grep} '^/nix/store/.*-libcxx-')
           # rewrite /nix/... library paths to point to /usr/lib
           chmod 777 $out/bin/echidna
           ${install_name_tool} -change "$cxx" /usr/lib/libc++.1.dylib $out/bin/echidna
           # fix TERMINFO path in ncurses
           ${perl} -i -pe 's#(${ncurses-static}/share/terminfo)#"/usr/share/terminfo" . "\x0" x (length($1) - 19)#e' $out/bin/echidna
+          # check that no nix deps remain
+          nixdeps=$(${otool} -L $out/bin/echidna | tail -n +2 | { ${grep} /nix/store -c || test $? = 1; })
+          if [ ! "$nixdeps" = "0" ]; then
+            echo "Nix deps remain in redistributable binary!"
+            exit 255
+          fi
           # re-sign binary
           CODESIGN_ALLOCATE=${codesign_allocate} ${codesign} -f -s - $out/bin/echidna
           chmod 555 $out/bin/echidna