diff --git a/binding.gyp b/binding.gyp
index 72c07839..00c2659e 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -4,19 +4,30 @@
     'include_dirs' : [
       # standard include:
       # '/usr/include',
-      '<!(node -e "require(\'nan\')")',
+
+      # boost:
       # '/usr/include/boost',
+
+      # leveldb:
       '<!(test -n "$BITCOIN_DIR" && echo "$BITCOIN_DIR" || echo "${HOME}/bitcoin")/src/leveldb/include',
+
+      # bitcoind:
       '<!(test -n "$BITCOIN_DIR" && echo "$BITCOIN_DIR" || echo "${HOME}/bitcoin")/src',
+
+      # nan:
+      '<!(node -e "require(\'nan\')")',
     ],
     'sources': [
       './src/bitcoindjs.cc',
     ],
     'defines': [
+      # boost sleep:
       '<!(test $(grep "#define BOOST_VERSION " /usr/include/boost/version.hpp'\
       ' | awk "{ print \$3 }") -gt 105200'\
       ' && echo HAVE_WORKING_BOOST_SLEEP_FOR'\
       ' || echo HAVE_WORKING_BOOST_SLEEP)',
+
+      # wallet:
       # Assume libbitcoind.so is always
       # compiled with wallet support.
       'ENABLE_WALLET',
@@ -29,12 +40,14 @@
       # standard libs:
       # '-L/usr/lib',
       # '-L/usr/local/lib',
+
       # boost:
       '-lboost_system',
       '-lboost_filesystem',
       '-lboost_program_options',
       '-lboost_thread',
       '-lboost_chrono',
+
       # bitcoind:
       '<!(test -n "$BITCOIN_DIR" && echo "$BITCOIN_DIR" || echo "${HOME}/bitcoin")/src/libbitcoind.so',
     ]