diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -5,6 +5,11 @@
 ## Unreleased changes
 
 
+## 0.1.0.5
+
+-   Minor changes; tooling; Nix support.
+
+
 ## 0.1.0.2
 
 -   Bugfix cabal file.
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2020, Dominik Schrempf
+Copyright (c) 2021, Dominik Schrempf
 
 All rights reserved.
 
diff --git a/dirichlet.cabal b/dirichlet.cabal
--- a/dirichlet.cabal
+++ b/dirichlet.cabal
@@ -1,47 +1,46 @@
-cabal-version:      2.4
-name:               dirichlet
-version:            0.1.0.4
-license:            BSD-3-Clause
-license-file:       LICENSE
-copyright:          Dominik Schrempf 2020
-maintainer:         dominik.schrempf@gmail.com
-author:             Dominik Schrempf
-homepage:           https://github.com/dschrempf/dirichlet
-bug-reports:        https://github.com/dschrempf/dirichlet
-synopsis:           Multivariate Dirichlet distribution
-description:
-    Please see the README on GitHub at <https://github.com/dschrempf/dirichlet#readme>
+cabal-version:       2.4
+name:                dirichlet
+version:             0.1.0.5
+synopsis:            Multivariate Dirichlet distribution
+description:         Please see the README on GitHub at <https://github.com/dschrempf/dirichlet#readme>
+homepage:            https://github.com/dschrempf/dirichlet
+bug-reports:         https://github.com/dschrempf/dirichlet
+license:             BSD-3-Clause
+license-file:        LICENSE
+author:              Dominik Schrempf
+maintainer:          dominik.schrempf@gmail.com
+copyright:           Dominik Schrempf 2021
+category:            Math
+build-type:          Simple
 
-category:           Math
-build-type:         Simple
 extra-source-files:
-    README.md
-    ChangeLog.md
+  README.md
+  ChangeLog.md
 
 library
-    exposed-modules:  Statistics.Distribution.Dirichlet
-    hs-source-dirs:   src
-    default-language: Haskell2010
-    ghc-options:      -Wall -Wunused-packages
-    build-depends:
-        base >=4.14.1.0 && <5,
-        log-domain >=0.13.1,
-        math-functions >=0.3.4.2,
-        mwc-random >=0.14.0.0,
-        primitive >=0.7.1.0,
-        vector >=0.12.3.0
+  exposed-modules:     Statistics.Distribution.Dirichlet
+  -- other-modules:
+  -- other-extensions:
+  ghc-options:       -Wall -Wunused-packages
+  build-depends:       base < 5
+                     , log-domain
+                     , math-functions
+                     , mwc-random
+                     , primitive
+                     , vector
+  hs-source-dirs:      src
+  default-language:    Haskell2010
 
 test-suite dirichlet-test
-    type:             exitcode-stdio-1.0
-    main-is:          Spec.hs
-    hs-source-dirs:   test
-    other-modules:    Statistics.Distribution.DirichletSpec
-    default-language: Haskell2010
-    ghc-options:      -Wall -Wunused-packages
-    build-depends:
-        base >=4.14.1.0 && <5,
-        dirichlet -any,
-        hspec >=2.7.10,
-        log-domain >=0.13.1,
-        mwc-random >=0.14.0.0,
-        vector >=0.12.3.0
+  default-language:    Haskell2010
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  other-modules:       Statistics.Distribution.DirichletSpec
+  ghc-options:       -Wall -Wunused-packages
+  build-depends:       base < 5
+                     , dirichlet
+                     , hspec
+                     , log-domain
+                     , mwc-random
+                     , vector
diff --git a/src/Statistics/Distribution/Dirichlet.hs b/src/Statistics/Distribution/Dirichlet.hs
--- a/src/Statistics/Distribution/Dirichlet.hs
+++ b/src/Statistics/Distribution/Dirichlet.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Distribution.Dirichlet
 -- Description :  Multivariate Dirichlet distribution
--- Copyright   :  (c) Dominik Schrempf, 2020
+-- Copyright   :  (c) Dominik Schrempf, 2021
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/test/Statistics/Distribution/DirichletSpec.hs b/test/Statistics/Distribution/DirichletSpec.hs
--- a/test/Statistics/Distribution/DirichletSpec.hs
+++ b/test/Statistics/Distribution/DirichletSpec.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  DirichletSpec
 -- Description :  Unit tests for DirichletSpec
--- Copyright   :  (c) Dominik Schrempf, 2020
+-- Copyright   :  (c) Dominik Schrempf, 2021
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com