diff --git a/source/dub/package_.d b/source/dub/package_.d
index 8abdf93..6557469 100644
--- a/source/dub/package_.d
+++ b/source/dub/package_.d
@@ -313,6 +313,8 @@
 		foreach (string k, v; bs.serializeToJson()) dst[k] = v;
 		dst.remove("requirements");
 		dst.remove("sourceFiles");
+		dst.remove("importFiles");
+		dst.remove("stringImportFiles");
 		dst.targetType = bs.targetType.to!string();
 		dst.targetFileName = getTargetFileName(bs, platform);
 
@@ -323,6 +325,13 @@
 				breqs ~= Json(to!string(cast(BuildRequirements)i));
 		dst.buildRequirements = breqs;
 
+		// prettify options output
+		Json[] bopts;
+		for (int i = 1; i <= BuildOptions.max; i <<= 1)
+			if (bs.options & i)
+				bopts ~= Json(to!string(cast(BuildOptions)i));
+		dst.options = bopts;
+
 		// prettify files output
 		Json[] files;
 		foreach (f; bs.sourceFiles) {