Fix build issues

polybar, unfree packages

.drone.jsonnet

@@ -13,7 +13,10 @@ local Pipeline(channel) = {
         "nix eval -f default.nix 'lib'",
         "nix eval -f default.nix 'modules'",
         "nix eval -f default.nix 'overlays'"
-      ]
+      ],
+      environment: {
+        NIXPKGS_ALLOW_UNFREE: 1
+      }
     },
     {
       name: "deploy",
@@ -24,6 +27,7 @@ local Pipeline(channel) = {
         //   curl -XPOST "https://nur-update.herokuapp.com/update?repo=${NUR_REPO}"; fi'
       ],
       environment: {
+        NIXPKGS_ALLOW_UNFREE: 1,
         NUR_REPO: "xeals",
         CACHIX_CACHE: "xeals",
         CACHIX_SIGNING_KEY: { from_secret: "cachix_key" },

.drone.yml

@@ -17,6 +17,8 @@ steps:
   - nix eval -f default.nix 'lib'
   - nix eval -f default.nix 'modules'
   - nix eval -f default.nix 'overlays'
+  environment:
+    NIXPKGS_ALLOW_UNFREE: 1
 
 - name: deploy
   image: nixpkgs/cachix
@@ -26,6 +28,7 @@ steps:
     CACHIX_CACHE: xeals
     CACHIX_SIGNING_KEY:
       from_secret: cachix_key
+    NIXPKGS_ALLOW_UNFREE: 1
     NUR_REPO: xeals
 
 ---
@@ -47,6 +50,8 @@ steps:
   - nix eval -f default.nix 'lib'
   - nix eval -f default.nix 'modules'
   - nix eval -f default.nix 'overlays'
+  environment:
+    NIXPKGS_ALLOW_UNFREE: 1
 
 - name: deploy
   image: nixpkgs/cachix
@@ -56,6 +61,7 @@ steps:
     CACHIX_CACHE: xeals
     CACHIX_SIGNING_KEY:
       from_secret: cachix_key
+    NIXPKGS_ALLOW_UNFREE: 1
     NUR_REPO: xeals
 
 ---
@@ -77,6 +83,8 @@ steps:
   - nix eval -f default.nix 'lib'
   - nix eval -f default.nix 'modules'
   - nix eval -f default.nix 'overlays'
+  environment:
+    NIXPKGS_ALLOW_UNFREE: 1
 
 - name: deploy
   image: nixpkgs/cachix
@@ -86,6 +94,7 @@ steps:
     CACHIX_CACHE: xeals
     CACHIX_SIGNING_KEY:
       from_secret: cachix_key
+    NIXPKGS_ALLOW_UNFREE: 1
     NUR_REPO: xeals
 
 ...

default.nix

@@ -76,7 +76,7 @@ rec {
     };
   });
 
-  polybar = polybar.overrideAttrs (oldAttrs: {
+  polybar = pkgs.polybar.overrideAttrs (oldAttrs: {
     # Enables an extra button in formatting, indirectly allowing the use of
     # the mouse forward and backward buttons.
     patches = (oldAttrs.patches or [ ]) ++ [ ./pkgs/applications/misc/polybar/9button.patch ];