diff --git a/RustLab/hello-world/main.rs b/RustLab/hello-world/main.rs
deleted file mode 100644
index fbedd92..0000000
--- a/RustLab/hello-world/main.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}
\ No newline at end of file
diff --git a/modules/applications/misc.nix b/modules/applications/misc.nix
index 3ebdba2..0cd8016 100644
--- a/modules/applications/misc.nix
+++ b/modules/applications/misc.nix
@@ -27,6 +27,7 @@
     vlc # video player
     gimp # image editing
     korganizer # calendar
+    libreoffice # free office suite
     akonadi
   ];
 }
diff --git a/modules/overlay.nix b/modules/overlay.nix
index 15c9189..e914c50 100644
--- a/modules/overlay.nix
+++ b/modules/overlay.nix
@@ -19,7 +19,6 @@ in {
 
         # unstable stuff
         brave = unstable.brave;
-        # ghc = unstable.ghc;
         vscodium = unstable.vscodium;
       })
   ];
diff --git a/nix/sources.json b/nix/sources.json
index 8ef1c9f..827d38d 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "363eb0959236e9ee69af19cdb311fc5ebabd8542",
-        "sha256": "0rl5zi5kzd298mk3rrkvwwqfs2xwfzsc2y8ch61f0jqf2xp8jslq",
+        "rev": "3b3eebbdfd77c92980a2575b0a7f44415e5c29e8",
+        "sha256": "1wpvchdgr3fn3m4wjywff6d427ykn6hjm6rmbq23fnjapf2vljbx",
         "type": "tarball",
-        "url": "https://github.com/nix-community/NUR/archive/363eb0959236e9ee69af19cdb311fc5ebabd8542.tar.gz",
+        "url": "https://github.com/nix-community/NUR/archive/3b3eebbdfd77c92980a2575b0a7f44415e5c29e8.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "agnoster": {
@@ -89,10 +89,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs-channels",
-        "rev": "14dd961b8d5a2d2d3b2cf6526d47cbe5c3e97039",
-        "sha256": "07nc06mff31hwg6d7spnabfbipxjxhg856z1gcwbyr1cx299y996",
+        "rev": "5adf2a6c11646898742b0c08f7e94101620ba707",
+        "sha256": "0wf7pwma2qyfak39b242mcq8z7cdj65sds7hcjxchy0448shapzi",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs-channels/archive/14dd961b8d5a2d2d3b2cf6526d47cbe5c3e97039.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs-channels/archive/5adf2a6c11646898742b0c08f7e94101620ba707.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs-unstable": {
@@ -101,10 +101,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "nixos",
         "repo": "nixpkgs-channels",
-        "rev": "fce7562cf46727fdaf801b232116bc9ce0512049",
-        "sha256": "14rvi69ji61x3z88vbn17rg5vxrnw2wbnanxb7y0qzyqrj7spapx",
+        "rev": "683c68232e91f76386db979c461d8fbe2a018782",
+        "sha256": "1fn7q540bk7nhvf6pnlljgfk51qwh2xpvvz30a1d4sd0l7z64mvc",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs-channels/archive/fce7562cf46727fdaf801b232116bc9ce0512049.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs-channels/archive/683c68232e91f76386db979c461d8fbe2a018782.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "snack": {