workaround for the Nix madness

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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -38,6 +38,21 @@ or:
 ```
 stack install
 ```
+Note that if you are unlucky to have Cabal 3.0 or later, then it uses
+the so-called Nix style commands. Using those for GF development is
+a pain. Every time when you change something in the source code, Cabal
+will generate a new folder for GF to look for the GF libraries and
+the GF cloud. Either reinstall everything with every change in the
+compiler, or be sane and stop using cabal-install. Instead you can do:
+```
+runghc Setup.hs configure
+runghc Setup.hs build
+runghc Setup.hs install
+```
+The script will install the GF dependencies globally. The only solution
+to the Nix madness that I found is radical:
+
+  "No person, no problem" (Нет человека – нет проблемы).
 
 For more information, including links to precompiled binaries, see the [download page](https://www.grammaticalframework.org/download/index.html).