diff --git a/.gn b/.gn
index 41187fd..59db446 100644
--- a/.gn
+++ b/.gn
@@ -15,3 +15,16 @@
   # PDFium does not want to switch to C++14 yet.
   use_cxx11 = true
 }
+
+check_targets = [
+  "//samples/*",
+
+  # TODO(thestig): Work on these.
+  #"//core/*",  # Need to split off.
+  #"//fpdfsdk/*",  # Need to split off.
+  #"//fxbarcode/*",  # Need to split off.
+  #"//fxjs/*",  # Need to split off.
+  #"//testing/*",
+  #"//testing/fuzzers/*",
+  #"//xfa/*",  # Need to split off.
+]
diff --git a/samples/BUILD.gn b/samples/BUILD.gn
index 30cc8ef..909de2e 100644
--- a/samples/BUILD.gn
+++ b/samples/BUILD.gn
@@ -58,10 +58,12 @@
   configs += [ ":pdfium_samples_config" ]
 
   if (pdf_enable_v8) {
-    deps += [ "//v8:v8_libplatform" ]
+    deps += [
+      "//v8:v8_headers",
+      "//v8:v8_libplatform",
+    ]
     include_dirs = [
       "//v8",
-      "//v8/include",
     ]
     configs += [ "//v8:external_startup_data" ]
   }