Fix "supportHpack: command not found" (#2007)

Dessix · web-flow · commit 755991c91c19 · 2023-07-25T13:11:19.000+12:00
Corrects the following failure signature to one which is at least sensible:
```
last 3 log lines:
&gt; /build/.attr-0l2nkwhif96f51f4amnlf414lhl4rv9vh8iffyp431v6s28gsr90: line 22: supportHpack: command not found
&gt; WARNING ./package.yaml has no .cabal file and was not set.
```
diff --git a/lib/call-cabal-project-to-nix.nix b/lib/call-cabal-project-to-nix.nix
@@ -423,7 +423,7 @@ let
               hpack $hpackFile
             ''
             else ''
-              echo WARNING $hpackFile has no .cabal file and `supportHpack` was not set.
+              echo "WARNING $hpackFile has no .cabal file and \`supportHpack\` was not set."
             ''
           }
         fi

Original file line number	Diff line number	Diff line change
`@@ -423,7 +423,7 @@ let`
`423`	`423`	`hpack $hpackFile`
`424`	`424`	`''`
`425`	`425`	`else ''`
`426`		- echo WARNING $hpackFile has no .cabal file and `supportHpack` was not set.
	`426`	+ echo "WARNING $hpackFile has no .cabal file and \`supportHpack\` was not set."
`427`	`427`	`''`
`428`	`428`	`}`
`429`	`429`	`fi`