diff --git a/src/rebar_core.erl b/src/rebar_core.erl
index 373a7e8..c5a3dc6 100644
--- a/src/rebar_core.erl
+++ b/src/rebar_core.erl
@@ -48,11 +48,6 @@ run(Args) ->
     %% Filter all the flags (i.e. string of form key=value) from the
     %% command line arguments. What's left will be the commands to run.
     Commands = filter_flags(Args, []),
-
-%    dbg:tracer(),
-    dbg:p(all, call),
-    dbg:tpl(rebar_core, []),
-    dbg:tpl(rebar_erlc_compiler, clean, []),
     
     %% Pre-load the rebar app so that we get default configuration
     ok = application:load(rebar),
@@ -160,7 +155,7 @@ rel_dir(Dir) ->
     
 
 
-apply_commands([], Modules, Config, ModuleFile) ->
+apply_commands([], _Modules, _Config, _ModuleFile) ->
     ok;
 apply_commands([Command | Rest], Modules, Config, ModuleFile) ->
     case select_modules(Modules, Command, []) of
@@ -207,7 +202,7 @@ expand_lib_dirs([], _Root, Acc) ->
 expand_lib_dirs([Dir | Rest], Root, Acc) ->
     Apps = filelib:wildcard(filename:join([Dir, '*', ebin])),
     FqApps = [filename:join([Root, A]) || A <- Apps],
-    expand_lib_dirs(Rest, Root, Apps ++ FqApps).
+    expand_lib_dirs(Rest, Root, Acc ++ FqApps).
 
 
 
diff --git a/src/rebar_ct.erl b/src/rebar_ct.erl
index 007e09f..b4f3612 100644
--- a/src/rebar_ct.erl
+++ b/src/rebar_ct.erl
@@ -131,7 +131,7 @@ show_log(RawLog) ->
 	    ok
     end.
 
-make_cmd(TestDir, Config) ->
+make_cmd(TestDir, _Config) ->
     {ok, Cwd} = file:get_cwd(),
     LogDir = filename:join(Cwd, "logs"),
     Ebin = filename:join(Cwd, "ebin"),
diff --git a/src/rebar_erlc_compiler.erl b/src/rebar_erlc_compiler.erl
index 7a969f7..12e20e9 100644
--- a/src/rebar_erlc_compiler.erl
+++ b/src/rebar_erlc_compiler.erl
@@ -151,7 +151,7 @@ compile_queue(Pids, Targets, Config, CompileFn) ->
             Pids2 = lists:delete({Pid, Mref}, Pids),
             compile_queue(Pids2, Targets, Config, CompileFn);
         
-        {'DOWN', Mref, _, Pid, Info} ->
+        {'DOWN', _Mref, _, _Pid, Info} ->
             ?DEBUG("Worker failed: ~p\n", [Info]),
             ?FAIL
     end.
diff --git a/src/rebar_eunit.erl b/src/rebar_eunit.erl
index a75a8a0..e82bd38 100644
--- a/src/rebar_eunit.erl
+++ b/src/rebar_eunit.erl
@@ -45,7 +45,7 @@
 %% Public API
 %% ===================================================================
 
-eunit(Config, File) ->
+eunit(Config, _File) ->
     %% Make sure ?EUNIT_DIR/ directory exists (tack on dummy module)
     ok = filelib:ensure_dir(?EUNIT_DIR ++ "/foo"),
 
@@ -105,7 +105,7 @@ eunit(Config, File) ->
     true = code:set_path(InitCodePath),
     ok.
 
-clean(Config, File) ->
+clean(_Config, _File) ->
     rebar_file_utils:rm_rf(?EUNIT_DIR).
     
 
@@ -148,7 +148,7 @@ is_quickcheck_avail() ->
             IsAvail
     end.
                           
-cover_init(Config) ->
+cover_init(_Config) ->
     %% Make sure any previous runs of cover don't unduly influence
     cover:reset(),
 
@@ -175,9 +175,9 @@ cover_init(Config) ->
             end
     end.
 
-cover_analyze(Config, []) ->
+cover_analyze(_Config, []) ->
     ok;
-cover_analyze(Config, Modules) ->    
+cover_analyze(_Config, Modules) ->    
     %% Generate coverage info for all the cover-compiled modules 
     Coverage = [cover_analyze_mod(M) || M <- Modules],
 
@@ -203,7 +203,7 @@ cover_analyze_mod(Module) ->
 
 cover_write_index(Coverage) ->
     %% Calculate total coverage %
-    {Covered, NotCovered} = lists:foldl(fun({Mod, C, N}, {CAcc, NAcc}) ->
+    {Covered, NotCovered} = lists:foldl(fun({_Mod, C, N}, {CAcc, NAcc}) ->
                                                 {CAcc + C, NAcc + N}
                                         end, {0, 0}, Coverage),
     TotalCoverage = percentage(Covered, NotCovered),
diff --git a/src/rebar_file_utils.erl b/src/rebar_file_utils.erl
index 8d21323..8cae1ee 100644
--- a/src/rebar_file_utils.erl
+++ b/src/rebar_file_utils.erl
@@ -56,7 +56,7 @@ ln_sf(Source, Dest) ->
         false ->
             ActualDest = Dest
     end,
-    [] = os:cmd(?FMT("ln -sf ~s ~s", [Source, Dest])),
+    [] = os:cmd(?FMT("ln -sf ~s ~s", [Source, ActualDest])),
     ok.
 
 delete_each([]) ->
diff --git a/src/rebar_otp_app.erl b/src/rebar_otp_app.erl
index 07e6457..7a9a135 100644
--- a/src/rebar_otp_app.erl
+++ b/src/rebar_otp_app.erl
@@ -33,7 +33,7 @@
 %% Public API
 %% ===================================================================
 
-compile(Config, File) ->
+compile(_Config, File) ->
     %% Load the app name and version from the .app file and construct
     %% the app identifier
     {ok, AppName, AppData} = rebar_app_utils:load_app_file(File),
diff --git a/src/rebar_port_compiler.erl b/src/rebar_port_compiler.erl
index c99cf04..a11fa19 100644
--- a/src/rebar_port_compiler.erl
+++ b/src/rebar_port_compiler.erl
@@ -150,7 +150,7 @@ run_cleanup_hook(Config) ->
     end.
 
 
-compile_each([], Config, Env, NewBins, ExistingBins) ->
+compile_each([], _Config, _Env, NewBins, ExistingBins) ->
     {lists:reverse(NewBins), lists:reverse(ExistingBins)};
 compile_each([Source | Rest], Config, Env, NewBins, ExistingBins) ->
     Ext = filename:extension(Source),