chawan: 0.3.3 -> 0.4.4

In the MakeFile, Build target `chac` will write its cache to $HOME.
Added `preBuild` as build needs to alias HOME to $TMPDIR as $HOME as $HOME istelf is immutable in nix sandbox

pkgs/by-name/ch/chawan/package.nix

@@ -14,13 +14,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "chawan";
-  version = "0.3.3";
+  version = "0.4.4";
 
   src = fetchFromSourcehut {
     owner = "~bptato";
     repo = "chawan";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-GVDh94pgdMlwHMyqtT8q2yM+rwioodBYQfA+AOZ/CsU=";
+    hash = "sha256-4MrJoBNQ4Sbx02/Cl/JdTux5UUu8ioSwRNvDxCH6gcY=";
   };
 
   nativeBuildInputs = [
@@ -35,6 +35,10 @@ stdenv.mkDerivation (finalAttrs: {
     libssh2
   ];
 
+  preBuild = ''
+    export HOME=$TMPDIR
+  '';
+
   buildFlags = [
     "all"
   ];