diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # ats-pkg
 
+## 3.4.0.1
+
+  * Install manpages to `/usr/local/share/man/man1` on Mac
+  * Disable optimizations when running `--debug`
+
 ## 3.4.0.0
 
   * Add `--debug` flag to `test` and `build` subcommands
diff --git a/ats-pkg.cabal b/ats-pkg.cabal
--- a/ats-pkg.cabal
+++ b/ats-pkg.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.0
 name:               ats-pkg
-version:            3.4.0.0
+version:            3.4.0.1
 license:            BSD3
 license-file:       LICENSE
 copyright:          Copyright: (c) 2018-2019 Vanessa McHale
diff --git a/man/atspkg.1 b/man/atspkg.1
--- a/man/atspkg.1
+++ b/man/atspkg.1
@@ -64,9 +64,6 @@
 .B \f[B]--pkg-args\f[R]
 Arguments to be passed to atspkg.dhall
 .TP
-.B \f[B]-c\f[R] \f[B]--no-cache\f[R]
-Ignore cached configuration file
-.TP
 .B \f[B]-r\f[R], \f[B]--rebuild\f[R]
 Rebuild all binary targets.
 .TP
@@ -78,9 +75,6 @@
 .TP
 .B \f[B]-v\f[R], \f[B]--verbose\f[R]
 Turn up the verbosity
-.TP
-.B \f[B]-d\f[R], \f[B]--detailed\f[R]
-Enable detailed error messages when checking configuration files
 .TP
 .B \f[B]--debug\f[R]
 Disable binary stripping and pass -g to the C compiler
diff --git a/src/Language/ATS/Package/Build.hs b/src/Language/ATS/Package/Build.hs
--- a/src/Language/ATS/Package/Build.hs
+++ b/src/Language/ATS/Package/Build.hs
@@ -29,6 +29,7 @@
 import           Language.ATS.Package.Dependency
 import           Language.ATS.Package.Type
 import           Quaalude
+import           System.Info                     (os)
 
 check :: Maybe String -> Maybe FilePath -> IO Bool
 check mStr p = do
@@ -96,9 +97,9 @@
         case man config of
             Just mt -> when pa $ do
                 let mt' = manTarget mt
-                    manDest = home </> ".local" </> "share" </> "man" </> "man1" </> takeFileName mt'
+                    manDestActual = manDest home mt'
                 need [mt']
-                copyFile' mt' manDest
+                copyFile' mt' manDestActual
             Nothing -> pure ()
         co <- compleat
         case completions config of
@@ -109,6 +110,13 @@
                 copyFile' com' comDest
             Nothing -> pure ()
 
+manDest :: FilePath -> FilePath -> FilePath
+manDest home mt' =
+    case os of
+        "darwin" -> "/usr/local/share/man/man1" </> takeFileName mt'
+        "linux"  -> home </> ".local" </> "share" </> "man" </> "man1" </> takeFileName mt'
+        _        -> error "Don't know where to install manpages for your OS"
+
 mkManpage :: Maybe String -> Rules ()
 mkManpage mStr = do
     c <- getConfig mStr Nothing
@@ -350,7 +358,7 @@
           h ph (Lib _ s t ls _ hs' lnk atg extra sta) =
             atsBin (ATSTarget (dbgFlags (unpack <$> cf)) (atsToolConfig ph) False (unpack <$> ls) (unpack <$> s) hs' (unpackTgt <$> atg) (unpackLinks <$> lnk) (unpack t) (deps extra) (k sta) False)
 
-          dbgFlags = if dbg then ("-g":) else id
+          dbgFlags = if dbg then ("-g":) . ("-O0":) . filter (/="-O2") else id
 
           k False = SharedLibrary
           k True  = StaticLibrary