diff --git a/boringssl/CMakeLists.txt b/boringssl/CMakeLists.txt
index 05f6571b..949691d2 100644
--- a/boringssl/CMakeLists.txt
+++ b/boringssl/CMakeLists.txt
@@ -15,8 +15,13 @@ enable_language(CXX)
 if(ANDROID)
   # Android-NDK CMake files reconfigure the path and so Go and Perl won't be
   # found. However, ninja will still find them in $PATH if we just name them.
-  set(PERL_EXECUTABLE "perl")
-  set(GO_EXECUTABLE "go")
+  if (NOT PERL_EXECUTABLE)
+    set(PERL_EXECUTABLE "perl")
+  endif()
+
+  if (NOT GO_EXECUTABLE)
+    set(GO_EXECUTABLE "go")
+  endif()
 else()
   find_package(Perl REQUIRED)
   find_program(GO_EXECUTABLE go)