upgrade to NixOS 20.03

home/home.nix

@@ -41,11 +41,11 @@ let
     pdfpc
     quaternion
     nheko
-    (unstable.spectral)
+    unstable.spectral
     wire-desktop
     gpx-viewer
     gpxsee
-    unstable.cawbird
+    cawbird
     tootle
     subsurface
     (
@@ -248,7 +248,6 @@ let
     ubuntu_font_family
     twemoji-color-font
     opensans-ttf
-    (iosevka.override { design = [ "slab" "term" ]; set = "serif"; })
     (iosevka.override { privateBuildPlan = { design = [ "slab" "sp-term" ]; family = "Iosevka Serif"; }; set = "serif"; })
     # TODO: vollkorn
     # TODO: humor-sans
@@ -298,7 +297,7 @@ in
     {
       enable = true;
       enableSshSupport = true;
-      #pinentryFlavor = "qt";
+      pinentryFlavor = "qt";
     };
 
   programs.ssh =