bzildBazelPackage: fix fetch with no markers

Previously the installPhase of the fixed ouput derivation would fail for
a package that has no markers, since `sed` would complain about having
no input files. If we use `find` instead of bash globs, that problem
goes away.

pkgs/build-support/build-bazel-package/default.nix

@@ -51,8 +51,10 @@ in stdenv.mkDerivation (fBuildAttrs // {
       rm -rf $bazelOut/external/{local_*,\@local_*}
 
       # Patching markers to make them deterministic
-      sed -i 's, -\?[0-9][0-9]*$, 1,' $bazelOut/external/\@*.marker
-      sed -i '/^ENV:TMP.*/d' $bazelOut/external/\@*.marker
+      find $bazelOut/external -name '@*\.marker' -exec sed -i \
+        -e 's, -\?[0-9][0-9]*$, 1,' \
+        -e '/^ENV:TMP.*/d' \
+        '{}' \;
 
       # Remove all vcs files
       rm -rf $(find $bazelOut/external -type d -name .git)