iosevka: fix quoting issue in buildPhase (#468331)

Author: Aleksanaa

pkgs/by-name/io/iosevka/package.nix

@@ -121,7 +121,7 @@ buildNpmPackage rec {
     runHook preBuild
 
     # pipe to cat to disable progress bar
-    npm run build --no-update-notifier --targets ttf::$pname -- --jCmd=$NIX_BUILD_CORES --verbosity=9 | cat
+    npm run build --no-update-notifier --targets ttf::"$pname" -- --jCmd=$NIX_BUILD_CORES --verbosity=9 | cat
 
     runHook postBuild
   '';