diff --git a/.travis.yml b/.travis.yml
index edbddfe..341b817 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,22 +1,20 @@
 # This Travis job script has been generated by a script via
 #
-#   haskell-ci 'checkers.cabal' '--output' '.travis.yml'
+#   haskell-ci 'checkers.cabal'
 #
 # For more information, see https://github.com/haskell-CI/haskell-ci
 #
-# version: 0.3.20190313
+# version: 0.3.20190815
 #
 language: c
 dist: xenial
-
 git:
-  submodules: false  # whether to recursively clone submodules
-
+  # whether to recursively clone submodules
+  submodules: false
 cache:
   directories:
     - $HOME/.cabal/packages
     - $HOME/.cabal/store
-
 before_cache:
   - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log
   # remove files that are regenerated by 'cabal update'
@@ -25,91 +23,125 @@ before_cache:
   - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.cache
   - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar
   - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx
-
   - rm -rfv $CABALHOME/packages/head.hackage
-
 matrix:
   include:
-    - compiler: "ghc-8.6.4"
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.6.4], sources: [hvr-ghc]}}
-    - compiler: "ghc-8.4.4"
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.4.4], sources: [hvr-ghc]}}
-    - compiler: "ghc-8.2.2"
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.2.2], sources: [hvr-ghc]}}
-    - compiler: "ghc-8.0.2"
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.0.2], sources: [hvr-ghc]}}
-    - compiler: "ghc-7.10.3"
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-7.10.3], sources: [hvr-ghc]}}
-
+    - compiler: ghc-8.8.1
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.8.1","cabal-install-3.0"]}}
+    - compiler: ghc-8.6.5
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.6.5","cabal-install-2.4"]}}
+    - compiler: ghc-8.4.4
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.4.4","cabal-install-2.4"]}}
+    - compiler: ghc-8.2.2
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.2.2","cabal-install-2.4"]}}
+    - compiler: ghc-8.0.2
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.0.2","cabal-install-2.4"]}}
+    - compiler: ghc-7.10.3
+      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-7.10.3","cabal-install-2.4"]}}
 before_install:
-  - HC=/opt/ghc/bin/${CC}
-  - HCPKG=${HC/ghc/ghc-pkg}
+  - HC=$(echo "/opt/$CC/bin/ghc" | sed 's/-/\//')
+  - WITHCOMPILER="-w $HC"
+  - HCPKG="$HC-pkg"
   - unset CC
   - CABAL=/opt/ghc/bin/cabal
   - CABALHOME=$HOME/.cabal
   - export PATH="$CABALHOME/bin:$PATH"
-  - ROOTDIR=$(pwd)
-  - HCNUMVER=$(( $(${HC} --numeric-version|sed -E 's/([0-9]+)\.([0-9]+)\.([0-9]+).*/\1 * 10000 + \2 * 100 + \3/') ))
+  - TOP=$(pwd)
+  - "HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\\d+)\\.(\\d+)\\.(\\d+)(\\.(\\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')"
   - echo $HCNUMVER
-
+  - CABAL="$CABAL -vnormal+nowrap+markoutput"
+  - set -o pipefail
+  - |
+    echo 'function blue(s) { printf "\033[0;34m" s "\033[0m " }'           >> .colorful.awk
+    echo 'BEGIN { state = "output"; }'                                     >> .colorful.awk
+    echo '/^-----BEGIN CABAL OUTPUT-----$/ { state = "cabal" }'            >> .colorful.awk
+    echo '/^-----END CABAL OUTPUT-----$/ { state = "output" }'             >> .colorful.awk
+    echo '!/^(-----BEGIN CABAL OUTPUT-----|-----END CABAL OUTPUT-----)/ {' >> .colorful.awk
+    echo '  if (state == "cabal") {'                                       >> .colorful.awk
+    echo '    print blue($0)'                                              >> .colorful.awk
+    echo '  } else {'                                                      >> .colorful.awk
+    echo '    print $0'                                                    >> .colorful.awk
+    echo '  }'                                                             >> .colorful.awk
+    echo '}'                                                               >> .colorful.awk
+  - cat .colorful.awk
+  - |
+    color_cabal_output () {
+      awk -f $TOP/.colorful.awk
+    }
+  - echo text | color_cabal_output
 install:
   - ${CABAL} --version
   - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
   - TEST=--enable-tests
   - BENCH=--enable-benchmarks
-  - GHCHEAD=${GHCHEAD-false}
-  - travis_retry ${CABAL} update -v
-  - sed -i.bak 's/^jobs:/-- jobs:/' $CABALHOME/config
-  - rm -fv cabal.project cabal.project.local
-  - grep -Ev -- '^\s*--' $CABALHOME/config | grep -Ev '^\s*$'
-  - rm -f cabal.project
+  - HEADHACKAGE=false
+  - rm -f $CABALHOME/config
+  - |
+    echo "verbose: normal +nowrap +markoutput"          >> $CABALHOME/config
+    echo "remote-build-reporting: anonymous"            >> $CABALHOME/config
+    echo "write-ghc-environment-files: always"          >> $CABALHOME/config
+    echo "remote-repo-cache: $CABALHOME/packages"       >> $CABALHOME/config
+    echo "logs-dir:          $CABALHOME/logs"           >> $CABALHOME/config
+    echo "world-file:        $CABALHOME/world"          >> $CABALHOME/config
+    echo "extra-prog-path:   $CABALHOME/bin"            >> $CABALHOME/config
+    echo "symlink-bindir:    $CABALHOME/bin"            >> $CABALHOME/config
+    echo "installdir:        $CABALHOME/bin"            >> $CABALHOME/config
+    echo "build-summary:     $CABALHOME/logs/build.log" >> $CABALHOME/config
+    echo "store-dir:         $CABALHOME/store"          >> $CABALHOME/config
+    echo "install-dirs user"                            >> $CABALHOME/config
+    echo "  prefix: $CABALHOME"                         >> $CABALHOME/config
+    echo "repository hackage.haskell.org"               >> $CABALHOME/config
+    echo "  url: http://hackage.haskell.org/"           >> $CABALHOME/config
+  - cat $CABALHOME/config
+  - rm -fv cabal.project cabal.project.local cabal.project.freeze
+  - travis_retry ${CABAL} v2-update -v
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
   - touch cabal.project
-  - "printf 'packages: \".\"\\n' >> cabal.project"
-  - "printf 'write-ghc-environment-files: always\\n' >> cabal.project"
-  - touch cabal.project.local
-  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | grep -vE -- '^(checkers)$' | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - |
+    echo "packages: ." >> cabal.project
+  - |
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(checkers)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
   - cat cabal.project || true
   - cat cabal.project.local || true
   - if [ -f "./configure.ac" ]; then (cd "." && autoreconf -i); fi
-  - rm -f cabal.project.freeze
-  - ${CABAL} new-freeze -w ${HC} ${TEST} ${BENCH} --project-file="cabal.project" --dry
-  - "cat \"cabal.project.freeze\" | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
-  - rm  "cabal.project.freeze"
-  - ${CABAL} new-build -w ${HC} ${TEST} ${BENCH} --project-file="cabal.project" --dep -j2 all
-  - ${CABAL} new-build -w ${HC} --disable-tests --disable-benchmarks --project-file="cabal.project" --dep -j2 all
-  - rm -rf .ghc.environment.* "."/dist
-  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
-
-# Here starts the actual work to be performed for the package under test;
-# any command which exits with a non-zero exit code causes the build to fail.
+  - ${CABAL} v2-freeze $WITHCOMPILER ${TEST} ${BENCH} | color_cabal_output
+  - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
+  - rm  cabal.project.freeze
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} --dep -j2 all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --dep -j2 all | color_cabal_output
 script:
-  # test that source-distributions can be generated
-  - ${CABAL} new-sdist all
+  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
+  # Packaging...
+  - ${CABAL} v2-sdist all | color_cabal_output
+  # Unpacking...
   - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
   - cd ${DISTDIR} || false
-  - find . -maxdepth 1 -name '*.tar.gz' -exec tar -xvf '{}' \;
-  - rm -f cabal.project
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec rm       '{}' \;
+  - PKGDIR_checkers="$(find . -maxdepth 1 -type d -regex '.*/checkers-[0-9.]*')"
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
   - touch cabal.project
-  - "printf 'packages: \"checkers-*/*.cabal\"\\n' >> cabal.project"
-  - "printf 'write-ghc-environment-files: always\\n' >> cabal.project"
-  - touch cabal.project.local
-  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | grep -vE -- '^(checkers)$' | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - |
+    echo "packages: ${PKGDIR_checkers}" >> cabal.project
+  - |
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(checkers)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
   - cat cabal.project || true
   - cat cabal.project.local || true
+  # Building...
   # this builds all libraries and executables (without tests/benchmarks)
-  - ${CABAL} new-build -w ${HC} --disable-tests --disable-benchmarks all
-
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all | color_cabal_output
+  # Building with tests and benchmarks...
   # build & run tests, build benchmarks
-  - ${CABAL} new-build -w ${HC} ${TEST} ${BENCH} all
-
-  # cabal check
-  - (cd checkers-* && ${CABAL} check)
-
-  # haddock
-  - ${CABAL} new-haddock -w ${HC} ${TEST} ${BENCH} all
-
-  # Build without installed constraints for packages in global-db
-  - rm -f cabal.project.local; ${CABAL} new-build -w ${HC} --disable-tests --disable-benchmarks all
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} all | color_cabal_output
+  # cabal check...
+  - (cd ${PKGDIR_checkers} && ${CABAL} -vnormal check)
+  # haddock...
+  - ${CABAL} v2-haddock $WITHCOMPILER ${TEST} ${BENCH} all | color_cabal_output
+  # Building without installed constraints for packages in global-db...
+  - rm -f cabal.project.local
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all | color_cabal_output
 
-# REGENDATA ["checkers.cabal","--output",".travis.yml"]
+# REGENDATA ["checkers.cabal"]
 # EOF
diff --git a/checkers.cabal b/checkers.cabal
index aec954c..e9f1b8e 100644
--- a/checkers.cabal
+++ b/checkers.cabal
@@ -17,7 +17,7 @@ License:             BSD3
 License-File:        COPYING
 Stability:           experimental
 build-type:          Simple
-tested-with:         GHC==8.6.4, GHC==8.4.4, GHC==8.2.2, GHC==8.0.2, GHC==7.10.3
+tested-with:         GHC==8.8.1, GHC==8.6.5, GHC==8.4.4, GHC==8.2.2, GHC==8.0.2, GHC==7.10.3
 homepage:            https://github.com/conal/checkers
 source-repository head
   type:     git