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-rw-r--r--src/rebar_prv_shell.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rebar_prv_shell.erl b/src/rebar_prv_shell.erl
index bf37ddf..4bd0886 100644
--- a/src/rebar_prv_shell.erl
+++ b/src/rebar_prv_shell.erl
@@ -54,7 +54,7 @@ init(State) ->
opts = []}),
{ok, State1}.
--spec do(rebar_state:t()) -> {ok, rebar_state:t()}.
+-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(Config) ->
shell(),
{ok, Config}.