diff --git a/srcpkgs/stack/patches/datakinds.patch b/srcpkgs/stack/patches/datakinds.patch
deleted file mode 100644
index 6da5cf5d61c..00000000000
--- a/srcpkgs/stack/patches/datakinds.patch
+++ /dev/null
@@ -1,14 +0,0 @@
---- a/src/Stack/Storage/User.hs	2020-10-15 15:51:28.000000000 +0200
-+++ b/src/Stack/Storage/User.hs	2020-12-06 20:51:06.632607164 +0100
-@@ -1,3 +1,4 @@
-+{-# LANGUAGE DataKinds #-}
- {-# LANGUAGE DerivingStrategies #-}
- {-# LANGUAGE FlexibleInstances #-}
- {-# LANGUAGE GADTs #-}
---- a/src/Stack/Storage/Project.hs	2020-10-15 15:51:28.000000000 +0200
-+++ b/src/Stack/Storage/Project.hs	2020-12-06 21:55:21.349484738 +0100
-@@ -1,3 +1,4 @@
-+{-# LANGUAGE DataKinds #-}
- {-# LANGUAGE DerivingStrategies #-}
- {-# LANGUAGE FlexibleInstances #-}
- {-# LANGUAGE GADTs #-}
diff --git a/srcpkgs/stack/patches/ghc-8.8.4.patch b/srcpkgs/stack/patches/ghc-8.8.4.patch
deleted file mode 100644
index e4cd0618da1..00000000000
--- a/srcpkgs/stack/patches/ghc-8.8.4.patch
+++ /dev/null
@@ -1,70 +0,0 @@
---- a/masterdir/builddir/stack-2.5.1/stack.cabal	2020-10-17 17:19:10.724179166 +0200
-+++ b/stack.cabal	2020-10-17 17:18:03.803498792 +0200
-@@ -234,6 +234,7 @@
-     , base >=4.10 && <5
-     , base64-bytestring
-     , bytestring
-+    , base16-bytestring == 0.1.1.7
-     , casa-client
-     , casa-types
-     , colour
-@@ -272,7 +273,7 @@
-     , neat-interpolation
-     , network-uri
-     , open-browser
--    , optparse-applicative
-+    , optparse-applicative == 0.15.1.0
-     , pantry >=0.5.1.3
-     , path
-     , path-io
-@@ -359,6 +360,7 @@
-     , base >=4.10 && <5
-     , base64-bytestring
-     , bytestring
-+    , base16-bytestring == 0.1.1.7
-     , casa-client
-     , casa-types
-     , colour
-@@ -396,7 +398,7 @@
-     , neat-interpolation
-     , network-uri
-     , open-browser
--    , optparse-applicative
-+    , optparse-applicative == 0.15.1.0
-     , pantry >=0.5.1.3
-     , path
-     , path-io
-@@ -480,6 +482,7 @@
-     , base >=4.10 && <5
-     , base64-bytestring
-     , bytestring
-+    , base16-bytestring == 0.1.1.7
-     , casa-client
-     , casa-types
-     , colour
-@@ -518,7 +521,7 @@
-     , neat-interpolation
-     , network-uri
-     , open-browser
--    , optparse-applicative
-+    , optparse-applicative == 0.15.1.0
-     , optparse-generic
-     , pantry >=0.5.1.3
-     , path
-@@ -609,6 +612,7 @@
-     , base >=4.10 && <5
-     , base64-bytestring
-     , bytestring
-+    , base16-bytestring == 0.1.1.7
-     , casa-client
-     , casa-types
-     , colour
-@@ -647,7 +651,7 @@
-     , neat-interpolation
-     , network-uri
-     , open-browser
--    , optparse-applicative
-+    , optparse-applicative == 0.15.1.0
-     , pantry >=0.5.1.3
-     , path
-     , path-io
diff --git a/srcpkgs/stack/patches/ppc.patch b/srcpkgs/stack/patches/ppc.patch
index ef661e16b5b..fc4c540f0f9 100644
--- a/srcpkgs/stack/patches/ppc.patch
+++ b/srcpkgs/stack/patches/ppc.patch
@@ -1,13 +1,14 @@
 --- a/src/Stack/Setup.hs
 +++ b/src/Stack/Setup.hs
-@@ -95,5 +95,6 @@ import              System.IO.Error (isPermissionError)
+@@ -91,6 +91,7 @@
  import              System.FilePath (searchPathSeparator)
  import qualified    System.FilePath as FP
  import              System.Permissions (setFileExecutable)
 +import              System.Endian (getSystemEndianness, Endianness (..))
  import              System.Uname (getRelease)
  import              Data.List.Split (splitOn)
-@@ -1264,4 +1265,9 @@ getOSKey platform =
+
+@@ -1241,6 +1242,11 @@
          Platform X86_64                Cabal.Windows -> return "windows64"
          Platform Arm                   Cabal.Linux   -> return "linux-armv7"
          Platform AArch64               Cabal.Linux   -> return "linux-aarch64"
@@ -16,16 +17,16 @@
 +            case getSystemEndianness of
 +                LittleEndian -> return "linux-powerpc64le"
 +                BigEndian    -> return "linux-powerpc64"
+         Platform Sparc                 Cabal.Linux   -> return "linux-sparc"
          Platform arch os -> throwM $ UnsupportedSetupCombo os arch
 
- downloadFromInfo
 --- a/stack.cabal
 +++ b/stack.cabal
-@@ -235,6 +235,7 @@ library
-       , conduit
-       , conduit-extra
-       , containers
-+      , cpu >=0.1.2
-       , cryptonite
-       , cryptonite-conduit
-       , deepseq
+@@ -246,6 +246,7 @@
+         conduit >=1.3.4.1,
+         conduit-extra >=1.3.5,
+         containers >=0.6.2.1,
++        cpu >=0.1.2,
+         cryptonite >=0.27,
+         cryptonite-conduit >=0.2.2,
+         deepseq >=1.4.4.0,
diff --git a/srcpkgs/stack/template b/srcpkgs/stack/template
index 257aba10e50..b95bf9ec59e 100644
--- a/srcpkgs/stack/template
+++ b/srcpkgs/stack/template
@@ -1,8 +1,8 @@
 # Template file for 'stack'
 pkgname=stack
-version=2.5.1
+version=2.7.1
 revision=1
-_stackage="lts-16.13"
+_stackage="lts-17.5"
 hostmakedepends="cabal-install pkg-config unzip"
 makedepends="zlib-devel pcre-devel"
 depends="git gmp-devel iana-etc"
@@ -10,10 +10,10 @@ short_desc="Cross-platform program for developing Haskell projects"
 maintainer="Leah Neukirchen <leah@vuxu.org>"
 license="BSD-3-Clause"
 homepage="https://haskellstack.org"
-distfiles="https://github.com/commercialhaskell/${pkgname}/archive/v${version}.tar.gz
+distfiles="https://hackage.haskell.org/package/${pkgname}-${version}/${pkgname}-${version}.tar.gz
  https://www.stackage.org/${_stackage}/cabal.config>cabal.config-${_stackage}"
-checksum="f29d63b91ff2bddd130b29ddee90a1f450706271a13d5d80b653b50379ffa076
- b9ac16e957c91b698bc8c06166b5fa61e8443ef97f87ab591a21d6fda4327b58"
+checksum="605bd8368b6fef9323ea71b79b08dd62270c49089a86b79fe67355f6b82cbc26
+ d03bee7e51bbdec5053573f94f644a6baeb140cdd95dbe47261e03c04306b252"
 skip_extraction="cabal.config-${_stackage}"
 nocross=yes
 nopie_files="/usr/bin/stack"