diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## v0.2.1 (2018-09-04)
+
+Bug fixes:
+
+- null bin-package-db for GHC 7.10 #118
+- Bump cabal2nix and remove upper bound #120
+- Parse mac operating system as osx or darwin #123
+- Don't use `src = ./.` #121
+- Pass --compiler to calls to cabal2nix #115
+
 ## v0.2 (2018-07-24)
 
 Major changes:
diff --git a/src/Stack2nix/External/Cabal2nix.hs b/src/Stack2nix/External/Cabal2nix.hs
--- a/src/Stack2nix/External/Cabal2nix.hs
+++ b/src/Stack2nix/External/Cabal2nix.hs
@@ -14,12 +14,13 @@
 import           Distribution.System         (Platform(..), Arch(..), OS(..))
 import           Language.Nix
 import           System.IO                   (hPutStrLn, stderr)
+import           Stack.Types.Version         (Version)
 import           Stack2nix.Types             (Args (..))
 
 import           Text.PrettyPrint.HughesPJClass (Doc)
 
-cabal2nix :: Args -> FilePath -> Maybe Text -> Maybe FilePath -> DB.HackageDB -> IO (Either Doc Derivation)
-cabal2nix Args{..} uri commit subpath hackageDB = do
+cabal2nix :: Args -> Version -> FilePath -> Maybe Text -> Maybe FilePath -> DB.HackageDB -> IO (Either Doc Derivation)
+cabal2nix Args{..} ghcVersion uri commit subpath hackageDB = do
   let runCmdArgs = args $ fromMaybe "." subpath
   hPutStrLn stderr $ unwords ("+ cabal2nix":runCmdArgs)
   options <- parseArgs runCmdArgs
@@ -31,6 +32,7 @@
       [ maybe [] (\c -> ["--revision", unpack c]) commit
       , ["--subpath", dir]
       , ["--system", fromCabalPlatform argPlatform]
+      , ["--compiler", "ghc-" ++ show ghcVersion]
       , [uri]
       ]
 
diff --git a/src/Stack2nix/External/Stack.hs b/src/Stack2nix/External/Stack.hs
--- a/src/Stack2nix/External/Stack.hs
+++ b/src/Stack2nix/External/Stack.hs
@@ -30,9 +30,7 @@
                                                                  withBuildConfig)
 import           Stack.Types.BuildPlan                          (PackageLocation (..),
                                                                  Repo (..))
-import           Stack.Types.Compiler                           (CVType (..),
-                                                                 CompilerVersion,
-                                                                 getGhcVersion)
+import           Stack.Types.Compiler                           (getGhcVersion)
 import           Stack.Types.Config
 import           Stack.Types.Config.Build                       (BuildCommand (..))
 import           Stack.Types.Nix
@@ -46,6 +44,7 @@
                                                                  packageIdentifierString)
 import           Stack.Types.PackageName                        (PackageName)
 import           Stack.Types.Runner
+import           Stack.Types.Version                            (Version)
 import           Stack2nix.External.Cabal2nix                   (cabal2nix)
 import           Stack2nix.Hackage                              (loadHackageDB)
 import           Stack2nix.Render                               (render)
@@ -66,20 +65,20 @@
   | NonHackagePackage PackageIdentifier (PackageLocation FilePath)
   deriving (Eq, Show)
 
-genNixFile :: Args -> FilePath -> Maybe String -> Maybe String -> DB.HackageDB -> PackageRef -> IO (Either Doc Derivation)
-genNixFile args baseDir uri argRev hackageDB pkgRef = do
+genNixFile :: Args -> Version -> FilePath -> Maybe String -> Maybe String -> DB.HackageDB -> PackageRef -> IO (Either Doc Derivation)
+genNixFile args ghcVersion baseDir uri argRev hackageDB pkgRef = do
   cwd <- getCurrentDirectory
   case pkgRef of
     NonHackagePackage _ident PLArchive {} -> error "genNixFile: No support for archive package locations"
     HackagePackage (PackageIdentifierRevision pkg _) ->
-      cabal2nix args ("cabal://" <> packageIdentifierString pkg) Nothing Nothing hackageDB
+      cabal2nix args ghcVersion ("cabal://" <> packageIdentifierString pkg) Nothing Nothing hackageDB
     NonHackagePackage _ident (PLRepo repo) ->
-      cabal2nix args (unpack $ repoUrl repo) (Just $ repoCommit repo) (Just (repoSubdirs repo)) hackageDB
+      cabal2nix args ghcVersion (unpack $ repoUrl repo) (Just $ repoCommit repo) (Just (repoSubdirs repo)) hackageDB
     NonHackagePackage _ident (PLFilePath path) -> do
       relPath <- makeRelativeToCurrentDirectory path
       projRoot <- canonicalizePath $ cwd </> baseDir
       let defDir = baseDir </> makeRelative projRoot path
-      cabal2nix args (fromMaybe defDir uri) (pack <$> argRev) (const relPath <$> uri) hackageDB
+      cabal2nix args ghcVersion (fromMaybe defDir uri) (pack <$> argRev) (const relPath <$> uri) hackageDB
 
 -- TODO: remove once we use flags, options
 sourceMapToPackages :: Map PackageName PackageSource -> [PackageRef]
@@ -99,9 +98,9 @@
   -> FilePath
   -> Maybe String
   -> Args
-  -> String
+  -> Version
   -> RIO env ()
-planAndGenerate boptsCli baseDir remoteUri args@Args {..} ghcnixversion = do
+planAndGenerate boptsCli baseDir remoteUri args@Args {..} ghcVersion = do
   (_targets, _mbp, _locals, _extraToBuild, sourceMap) <- loadSourceMapFull
     NeedTargets
     boptsCli
@@ -114,11 +113,11 @@
     argThreads
     (\p ->
       fmap (addGhcOptions buildConf p)
-        <$> genNixFile args baseDir remoteUri argRev hackageDB p
+        <$> genNixFile args ghcVersion baseDir remoteUri argRev hackageDB p
     )
     pkgs
   let locals = map (\l -> show (packageName (lpPackage l))) _locals
-  liftIO $ render drvs args locals ghcnixversion
+  liftIO . render drvs args locals $ nixVersion ghcVersion
 
 -- | Add ghc-options declared in stack.yaml to the nix derivation for a package
 --   by adding to the configureFlags attribute of the derivation
@@ -150,18 +149,21 @@
   let stackFile = baseDir </> argStackYaml
 
   ghcVersion <- getGhcVersionIO globals stackFile
-  let ghcnixversion = filter (/= '.') $ show (getGhcVersion ghcVersion)
-  ensureExecutable ("haskell.compiler.ghc" ++ ghcnixversion)
-  withBuildConfig globals $ planAndGenerate buildOpts baseDir remoteUri args ghcnixversion
+  ensureExecutable ("haskell.compiler.ghc" ++ nixVersion ghcVersion)
+  withBuildConfig globals $ planAndGenerate buildOpts baseDir remoteUri args ghcVersion
 
-getGhcVersionIO :: GlobalOpts -> FilePath -> IO (CompilerVersion 'CVWanted)
+nixVersion :: Version -> String
+nixVersion =
+  filter (/= '.') . show
+
+getGhcVersionIO :: GlobalOpts -> FilePath -> IO Version
 getGhcVersionIO go stackFile = do
   cp <- canonicalizePath stackFile
   fp <- parseAbsFile cp
   lc <- withRunner LevelError True False ColorAuto Nothing False $ \runner ->
     -- https://www.fpcomplete.com/blog/2017/07/the-rio-monad
     runRIO runner $ loadConfig mempty Nothing (SYLOverride fp)
-  loadCompilerVersion go lc
+  getGhcVersion <$> loadCompilerVersion go lc
 
 globalOpts :: FilePath -> FilePath -> Args -> GlobalOpts
 globalOpts currentDir stackRoot Args{..} =
diff --git a/src/Stack2nix/Render.hs b/src/Stack2nix/Render.hs
--- a/src/Stack2nix/Render.hs
+++ b/src/Stack2nix/Render.hs
@@ -42,6 +42,8 @@
 basePackages = Set.fromList
   [ "array"
   , "base"
+  -- bin-package-db is in GHC 7.10's boot libraries
+  , "bin-package-db"
   , "binary"
   , "bytestring"
   , "Cabal"
@@ -137,8 +139,6 @@
 defaultNix :: (Doc -> String) -> String -> [Doc] -> String
 defaultNix pp ghcnixversion drvs = unlines $
  [ "# Generated using stack2nix " <> display version <> "."
- , "#"
- , "# Only works with sufficiently recent nixpkgs, e.g. \"NIX_PATH=nixpkgs=https://github.com/NixOS/nixpkgs/archive/21a8239452adae3a4717772f4e490575586b2755.tar.gz\"."
  , ""
  , "{ pkgs ? (import <nixpkgs> {})"
  , ", compiler ? pkgs.haskell.packages.ghc" ++ ghcnixversion
diff --git a/stack2nix.cabal b/stack2nix.cabal
--- a/stack2nix.cabal
+++ b/stack2nix.cabal
@@ -1,5 +1,5 @@
 name:                stack2nix
-version:             0.2
+version:             0.2.1
 synopsis:            Convert stack.yaml files into Nix build instructions.
 description:         Convert stack.yaml files into Nix build instructions.
 license:             MIT
@@ -22,7 +22,7 @@
   build-depends:       base >=4.9 && <4.12
                      , Cabal >= 2.0.0.2 && < 2.3
                      , async >= 2.1.1.1 && < 2.3
-                     , cabal2nix >= 2.10 && < 2.11
+                     , cabal2nix >= 2.10
                      , containers >= 0.5.7.1 && < 0.6
                      , directory >= 1.3 && < 1.4
                      , distribution-nixpkgs >= 1.1 && < 1.2
diff --git a/stack2nix/Main.hs b/stack2nix/Main.hs
--- a/stack2nix/Main.hs
+++ b/stack2nix/Main.hs
@@ -39,9 +39,16 @@
     -- | Copied from cabal2nix/src/Cabal2nix.hs
     platformReader :: P.ReadP r Platform
     platformReader = do
-      arch <- P.choice [P.string "i686" >> return I386, P.string "x86_64" >> return X86_64]
+      arch <- P.choice
+          [ P.string "i686" >> return I386
+          , P.string "x86_64" >> return X86_64
+          ]
       _ <- P.char '-'
-      os <- P.choice [P.string "linux" >> return Linux, P.string "darwin" >> return OSX]
+      os <- P.choice
+          [ P.string "linux" >> return Linux
+          , P.string "osx" >> return OSX
+          , P.string "darwin" >> return OSX
+          ]
       return (Platform arch os)
 
     readP :: P.ReadP a a -> ReadM a