diff --git a/.envrc b/.envrc
index b915ba0..5edf0c2 100644
--- a/.envrc
+++ b/.envrc
@@ -1,3 +1,4 @@
+watch_file rust-toolchain.toml
 use flake
 
 dotenv_if_exists
diff --git a/Cargo.lock b/Cargo.lock
index 3d2fe83..20ed766 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -421,7 +421,7 @@ dependencies = [
 
 [[package]]
 name = "ha-now-playing"
-version = "0.4.3"
+version = "0.4.4"
 dependencies = [
  "anyhow",
  "async-tungstenite",
diff --git a/Cargo.toml b/Cargo.toml
index 3e5c36a..eab2466 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
 name = "ha-now-playing"
 description = "Retrieves the state of a media_player entity from Home Assistant"
-version = "0.4.3"
+version = "0.4.4"
 authors = ["Erwin Boskma <erwin@datarift.nl>"]
 edition = "2021"
+include = ["src/**/*"]
 
 [dependencies]
 anyhow = "1.0.56"
diff --git a/flake.lock b/flake.lock
index bfda706..f98a0a8 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1651574473,
-        "narHash": "sha256-wQhFORvRjo8LB2hTmETmv6cbyKGDPbfWqvZ/0chnDE4=",
+        "lastModified": 1662220400,
+        "narHash": "sha256-9o2OGQqu4xyLZP9K6kNe1pTHnyPz0Wr3raGYnr9AIgY=",
         "owner": "nmattia",
         "repo": "naersk",
-        "rev": "f21309b38e1da0d61b881b6b6d41b81c1aed4e1d",
+        "rev": "6944160c19cb591eb85bbf9b2f2768a935623ed3",
         "type": "github"
       },
       "original": {
@@ -23,11 +23,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1652172129,
-        "narHash": "sha256-8e2JMrswaKe02P8rYfvIMoc59pNuw6h/GYu8DBE1c+0=",
+        "lastModified": 1667482890,
+        "narHash": "sha256-pua0jp87iwN7NBY5/ypx0s9L9CG49Ju/NI4wGwurHc4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f419dc5763c2b3c5580e396dea065b6d8b58ee27",
+        "rev": "a2a777538d971c6b01c6e54af89ddd6567c055e8",
         "type": "github"
       },
       "original": {
@@ -55,11 +55,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1652236937,
-        "narHash": "sha256-anMSkIvaxB3jV74nTvPcE8fH7bZ5LPuc2wXGvt50Oe0=",
+        "lastModified": 1667616267,
+        "narHash": "sha256-EYzGCJaTNTSbUk5sa2i4/dn71YtE6uvZb9syL8GH1U0=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "18c816d2d10317f4a8816925a12cb4bbdd0821de",
+        "rev": "a785c5db0ab1b10e6ba04b7240628aea9615e9ad",
         "type": "github"
       },
       "original": {
@@ -70,11 +70,11 @@
     },
     "utils": {
       "locked": {
-        "lastModified": 1649676176,
-        "narHash": "sha256-OWKJratjt2RW151VUlJPRALb7OU2S5s+f0vLj4o1bHM=",
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "a4b154ebbdc88c8498a5c7b01589addc9e9cb678",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 7478b2b..0635c23 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,7 +28,7 @@
           pkgs.openssl
         ];
         nativeBuildInputs = [
-          pkgs.pkg-config
+          pkgs.pkgconf
         ];
       in
       rec {
diff --git a/src/main.rs b/src/main.rs
index 7f4fc8b..f72a524 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,30 +18,36 @@ mod output;
 #[clap(version, author, about)]
 struct Opts {
     /// Home Assistant host
-    #[clap(short, long)]
+    #[clap(short, long, env = "HNP_HOST")]
     host: String,
 
     /// Media player entity ID
-    #[clap(short, long)]
+    #[clap(short, long, env = "HNP_ENTITY")]
     entity: String,
 
     /// API token
-    #[clap(short, long, env)]
+    #[clap(short, long, env = "HNP_TOKEN")]
     token: Option<String>,
 
     /// File with the API token
-    #[clap(long, env)]
+    #[clap(long, env, env = "HNP_TOKEN_FILE")]
     token_file: Option<PathBuf>,
 
     /// Use HTTP instead of HTTPS
-    #[clap(short, long)]
+    #[clap(short, long, env = "HNP_INSECURE")]
     insecure: bool,
 
     /// Output format
-    #[clap(arg_enum, short, long, default_value = "waybar")]
+    #[clap(
+        arg_enum,
+        short,
+        long,
+        env = "HNP_OUTPUT_FORMAT",
+        default_value = "waybar"
+    )]
     format: output::OutputFormat,
 
-    #[clap(short, long)]
+    #[clap(short, long, env = "HNP_DEBUG")]
     debug: bool,
 
     #[clap(subcommand)]