<s>
Stack	B-Application
is	O
a	O
tool	O
to	O
build	O
Haskell	B-Language
projects	O
and	O
manage	O
their	O
dependencies	O
.	O
</s>
<s>
It	O
uses	O
the	O
Cabal	B-Application
library	O
but	O
with	O
a	O
curated	O
version	O
of	O
the	O
Hackage	O
repository	O
called	O
Stackage	O
.	O
</s>
<s>
Stack	B-Application
competes	O
against	O
Cabal	B-Application
's	O
binary	O
cabal-install	O
and	O
has	O
been	O
created	O
as	O
a	O
result	O
of	O
the	O
overall	O
criticism	O
about	O
dependency	O
problems	O
.	O
</s>
<s>
It	O
does	O
not	O
,	O
however	O
,	O
provide	O
its	O
own	O
package	B-Application
format	I-Application
,	O
but	O
uses	O
existing	O
*	O
.cabal	O
files	O
and	O
complements	O
projects	O
with	O
an	O
additional	O
stack.yaml	O
file	O
.	O
</s>
