diff --git a/appveyor.yml b/appveyor.yml
index ab523402105a045acba2080e9021c136c804ce1b..951cddc78a1af346a60878754c2b5aa47a0eb451 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,3 +1,5 @@
+# Read https://hub.zhox.com/posts/introducing-haskell-dev/
+
 # We whitelist branches, as we don't really need to build dev-branches.
 # Remember to add release branches, both here and to .travis.yml.
 branches:
@@ -24,8 +26,11 @@ install:
   - choco install -y cabal --version 3.0.0.0
   - choco install -y ghc --version 8.6.5
   - refreshenv
+
+before_build:
   - cabal --version
-  - cabal %CABOPTS% update
+  - ghc --version
+  - cabal %CABOPTS% v2-update
   - cabal %CABOPTS% v1-install happy alex
 
 environment:
@@ -35,24 +40,25 @@ environment:
     # https://www.appveyor.com/docs/build-cache/#skipping-cache-operations-for-specific-build
     APPVEYOR_CACHE_SKIP_RESTORE: true
 
+clone_folder: "c:\\WORK"
+
 cache:
   - dist-newstyle
   - "C:\\sr"
 
 build_script:
   - runghc cabal-dev-scripts/src/Preprocessor.hs -o cabal-install/cabal-install.cabal -f CABAL_FLAG_LIB cabal-install/cabal-install.cabal.pp
-  - cabal %CABOPTS% new-configure --enable-tests
-  - appveyor-retry cabal %CABOPTS% new-build lib:Cabal --only-dependencies
-  - cabal %CABOPTS% new-build lib:Cabal
-  - appveyor-retry cabal %CABOPTS% new-build Cabal:tests --only-dependencies
-  - cabal %CABOPTS% new-test Cabal
-  - appveyor-retry cabal %CABOPTS% new-build exe:cabal exe:cabal-tests --only-dependencies
-  - cabal %CABOPTS% new-build exe:cabal
-  - cabal %CABOPTS% new-run cabal-tests -- -j3 --with-cabal=dist-newstyle\build\x86_64-windows\ghc-8.6.5\cabal-install-3.1.0.0\x\cabal\build\cabal\cabal.exe
-  - appveyor-retry cabal %CABOPTS% new-build cabal-install:tests --only-dependencies
+  - cabal %CABOPTS% v2-configure --enable-tests
+  - appveyor-retry cabal %CABOPTS% v2-build lib:Cabal --only-dependencies
+  - cabal %CABOPTS% v2-build lib:Cabal
+  - appveyor-retry cabal %CABOPTS% v2-build Cabal:tests --only-dependencies
+  - cabal %CABOPTS% v2-test Cabal
+  - appveyor-retry cabal %CABOPTS% v2-build exe:cabal exe:cabal-tests --only-dependencies
+  - cabal %CABOPTS% v2-build exe:cabal
+  - cabal %CABOPTS% v2-run cabal-tests -- -j3 --with-cabal=dist-newstyle\build\x86_64-windows\ghc-8.6.5\cabal-install-3.1.0.0\x\cabal\build\cabal\cabal.exe
+  - appveyor-retry cabal %CABOPTS% v2-build cabal-install:tests --only-dependencies
   - cd cabal-install
-  - cabal %CABOPTS% new-run cabal-install:memory-usage-tests
-  - cabal %CABOPTS% new-run cabal-install:solver-quickcheck
-  - cabal %CABOPTS% new-run cabal-install:integration-tests2
-  - cabal %CABOPTS% new-run cabal-install:unit-tests -- --pattern "! (/FileMonitor/ || /VCS/ || /Get/)"
-  
+  - cabal %CABOPTS% v2-run cabal-install:memory-usage-tests
+  - cabal %CABOPTS% v2-run cabal-install:solver-quickcheck
+  - cabal %CABOPTS% v2-run cabal-install:integration-tests2
+  - cabal %CABOPTS% v2-run cabal-install:unit-tests -- --pattern "! (/FileMonitor/ || /VCS/ || /Get/)"