Rename ghc-9.0.1-alpha1 to 9.0.0.20200925 wrt #73

README.md

@@ -163,6 +163,17 @@ In addition this script can also install `cabal-install`.
 
 ## Known problems
 
+### Custom ghc version names
+
+When installing ghc bindists with custom version names as outlined in
+[installing custom bindists](#installing-custom-bindists), then cabal might
+be unable to find the correct `ghc-pkg` (also see [#73](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/73))
+if you use `cabal build --with-compiler=ghc-foo`. Instead, point it to the full path, such as:
+`cabal build --with-compiler=$HOME/.ghcup/ghc/<version-name>/bin/ghc` or set that GHC version
+as the current one via: `ghcup set ghc <version-name>`.
+
+This problem doesn't exist for regularly installed GHC versions.
+
 ### Limited distributions supported
 
 Currently only GNU/Linux distributions compatible with the [upstream GHC](https://www.haskell.org/ghc/download_ghc_8_6_1.html#binaries) binaries are supported.

ghcup-0.0.3.yaml

@@ -1193,7 +1193,7 @@ ghcupDownloads:
               dlUri: https://files.hasufell.de/ghc/ghc-8.10.2-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.10.2
               dlHash: 9ee1cf1e85e9536088b3c9e80e975074e525ea378cd4eb156071bbc4b7b38327
-    9.0.1-alpha1:
+    9.0.0.20200925:
       viTags:
       - Prerelease
       - base-4.15.0.0