diff --git a/hadrian.cabal b/hadrian.cabal
index af5fd6c4528439ccb42053a6c8618064a5c8131f..da905ffbd73a038b6562ad9e6a26277108cb3bb4 100644
--- a/hadrian.cabal
+++ b/hadrian.cabal
@@ -122,10 +122,10 @@ executable hadrian
                        , ansi-terminal        == 0.6.*
                        , Cabal                == 2.0.0.2
                        , containers           == 0.5.*
-                       , directory            == 1.2.*
+                       , directory            >= 1.2 && < 1.4
                        , extra                >= 1.4.7
                        , mtl                  == 2.2.*
-                       , QuickCheck           >= 2.6 && < 2.9
+                       , QuickCheck           >= 2.6 && < 2.10
                        , shake                >= 0.15.6
                        , transformers         >= 0.4 && < 0.6
                        , unordered-containers == 0.2.*
diff --git a/stack.yaml b/stack.yaml
index 5fa9f94d2e16eb43a81f8fc84788b36638cc0432..a05f2cdad6f0b372bcb60b9788fdb53865cedbb1 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,36 +1,18 @@
 # For more information, see: http://docs.haskellstack.org/en/stable/yaml_configuration.html
 
 # Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-6.12
+resolver: lts-9.0
 
 # Local packages, usually specified by relative directory name
 packages:
 - '.'
 - '../libraries/Cabal/Cabal'
 
-# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
-extra-deps:
-
-# Override default flag values for local packages and extra-deps
-flags: {}
-
-# Extra package databases containing global packages
-extra-package-dbs: []
-
-# Control whether we use the GHC we find on the path
-# system-ghc: false
-
-# Require a specific version of stack, using version ranges
-# require-stack-version: -any # Default
-# require-stack-version: >= 1.0.0
-
-# Override the architecture used by stack, especially useful on Windows
-# arch: i386
-# arch: x86_64
-
-# Extra directories used by stack for building
-# extra-include-dirs: [/path/to/dir]
-# extra-lib-dirs: [/path/to/dir]
-
-# Allow a newer minor version of GHC than the snapshot specifies
-# compiler-check: newer-minor
+nix:
+   packages:
+   - autoconf
+   - automake
+   - gcc
+   - git
+   - ncurses
+   - perl