$ ghc -V
The Glorius Glasgow Haskell Compilation System, version 8.8.3
cabal install Agda
$ agda -V
Agda version 2.5.1
安裝 Haskell
$ ghc -V
The Glorius Glasgow Haskell Compilation System, version 8.8.3
安裝 Agda
cabal install Agda
$ agda -V
Agda version 2.5.1
安裝 Agda standard library
VS Code & 擴充功能 agda-mode
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