ghcup fails on Ubuntu 20.04.2 LTS with `NonZeroExit 2 "make" ["install"]`

I just tried running ghcup on my Ubuntu box, but got an install error:

> curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh

Welcome to Haskell!

This script will download and install the following binaries:
  * ghcup - The Haskell toolchain installer
            (for managing GHC/cabal versions)
  * ghc   - The Glasgow Haskell Compiler
  * cabal - The Cabal build tool

ghcup installs only into the following directory,
which can be removed anytime:
  /home/skainswo/.ghcup

Press ENTER to proceed or ctrl-c to abort.
Note that this script can be re-run at any given time.


  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 20.2M  100 20.2M    0     0  3467k      0  0:00:05  0:00:05 --:--:-- 3609k
[ Info  ] Upgrading GHCup...
[ Warn  ] No GHCup update available

System requirements 
  Please install the following distro packages: build-essential curl libffi-dev libffi7 libgmp-dev libgmp10 libncurses-dev libncurses5 libtinfo5

Press ENTER to proceed or ctrl-c to abort.
Installation may take a while.


[ Info  ] downloading: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-fedora27-linux.tar.xz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  207M  100  207M    0     0  3577k      0  0:00:59  0:00:59 --:--:-- 3621k
[ Info  ] verifying digest of: ghc-8.10.4-x86_64-fedora27-linux.tar.xz
[ Info  ] Unpacking: ghc-8.10.4-x86_64-fedora27-linux.tar.xz to /tmp/ghcup-ffaHKo
[ Info  ] Installing GHC (this may take a while)
[ ghc-make ] "rm" -f libraries/ghc-boot/dist-install/build/GHC/Platform/Host.hs  
[ ghc-make ] done.
[ ghc-make ] "inplace/bin/mkdirhier" libraries/ghc-boot/dist-boot/build/GHC//.
[ ghc-make ] mkdir: ./libraries/ghc-boot/dist-boot/build/GHC//.: No such file or directory (os e...
[ ghc-make ] make[1]: *** [ghc.mk:367: libraries/ghc-boot/dist-boot/build/GHC//.] Error 1
[ ghc-make ] make: *** [Makefile:51: install] Error 2
[ Error ] BuildFailed failed in dir "/tmp/ghcup-ffaHKo": NonZeroExit 2 "make" ["install"]
    Check the logs at "/home/skainswo/.ghcup/logs" and the build directory "/tmp/ghcup-ffaHKo" for more clues.
    Make sure to clean up "/tmp/ghcup-ffaHKo" afterwards.
"_eghcup --cache install ghc recommended" failed!