diff --git a/Stackage2/BuildPlan.hs b/Stackage2/BuildPlan.hs
index c3a35739..16d26606 100644
--- a/Stackage2/BuildPlan.hs
+++ b/Stackage2/BuildPlan.hs
@@ -20,6 +20,7 @@ import Stackage2.CorePackages
 import Stackage2.PackageConstraints
 import Stackage2.PackageIndex
 import Stackage2.Prelude
+import Stackage2.GithubPings
 import Control.Monad.State.Strict (execState, get, put)
 import qualified Data.Map as Map
 import qualified Data.Set as Set
@@ -77,6 +78,7 @@ instance desc ~ () => FromJSON (BuildPlan desc) where
 data PackageBuild desc = PackageBuild
     { pbVersion           :: Version
     , pbMaintainer        :: Maybe Maintainer
+    , pbGithubPings       :: Set Text
     , pbUsers             :: Set PackageName
     , pbFlags             :: Map FlagName Bool
     , pbTestState         :: TestState
@@ -95,6 +97,7 @@ instance ToJSON (PackageBuild desc) where
         [ maybe [] (\m -> ["maintainer" .= m]) pbMaintainer
         ,
             [ "version" .= asText (display pbVersion)
+            , "github-pings" .= pbGithubPings
             , "users" .= map unPackageName (unpack pbUsers)
             , "flags" .= Map.mapKeysWith const (\(FlagName f) -> asText $ pack f) pbFlags
             , "test-state" .= pbTestState
@@ -106,6 +109,7 @@ instance desc ~ () => FromJSON (PackageBuild desc) where
     parseJSON = withObject "PackageBuild" $ \o -> PackageBuild
         <$> (o .: "version" >>= efail . simpleParse . asText)
         <*> o .:? "maintainer"
+        <*> o .:? "github-pings" .!= mempty
         <*> (Set.map PackageName <$> (o .:? "users" .!= mempty))
         <*> (toFlags <$> (o .:? "flags" .!= mempty))
         <*> o .: "test-state"
@@ -267,6 +271,7 @@ simplifyDesc gpd = do
     return PackageBuild
         { pbVersion = version
         , pbMaintainer = fmap snd $ lookup name $ pcPackages defaultPackageConstraints
+        , pbGithubPings = getGithubPings gpd
         , pbUsers = mempty -- must be filled in later
         , pbFlags = packageFlags name
         , pbTestState =
diff --git a/Stackage2/GithubPings.hs b/Stackage2/GithubPings.hs
new file mode 100644
index 00000000..8891518d
--- /dev/null
+++ b/Stackage2/GithubPings.hs
@@ -0,0 +1,33 @@
+{-# LANGUAGE OverloadedStrings, NoImplicitPrelude #-}
+module Stackage2.GithubPings
+    ( getGithubPings
+    ) where
+
+import Stackage2.Prelude
+import Distribution.PackageDescription
+import qualified Stackage.Config as Old
+
+-- | Determine accounts to be pinged on Github based on various metadata in the
+-- package description.
+getGithubPings :: GenericPackageDescription -> Set Text
+getGithubPings gpd =
+    setFromList $ map pack $ foldMap Old.convertGithubUser $
+        goHomepage (homepage $ packageDescription gpd) ++
+        concatMap goRepo (sourceRepos $ packageDescription gpd)
+  where
+    goHomepage t = do
+        prefix <-
+            [ "http://github.com/"
+            , "https://github.com/"
+            , "git://github.com/"
+            , "git@github.com:"
+            ]
+        t' <- maybeToList $ stripPrefix prefix t
+        let t'' = takeWhile (/= '/') t'
+        guard $ not $ null t''
+        return t''
+
+    goRepo sr =
+        case (repoType sr, repoLocation sr) of
+            (Just Git, Just s) -> goHomepage s
+            _ -> []
diff --git a/stackage.cabal b/stackage.cabal
index ec1e44ef..3dcd6686 100644
--- a/stackage.cabal
+++ b/stackage.cabal
@@ -36,6 +36,7 @@ library
                        Stackage2.CorePackages
                        Stackage2.PackageIndex
                        Stackage2.BuildPlan
+                       Stackage2.GithubPings
   build-depends:       base >= 4 && < 5
                      , containers
                      , Cabal >= 1.14