diff --git a/Cargo.lock b/Cargo.lock
index 7cd75c2..518257e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -518,7 +518,6 @@ dependencies = [
  "clap",
  "clap_derive",
  "dyesub",
- "svg-units",
 ]
 
 [[package]]
@@ -585,20 +584,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
-[[package]]
-name = "err-derive"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c34a887c8df3ed90498c1c437ce21f211c8e27672921a8ffa293cb8d6d4caa9e"
-dependencies = [
- "proc-macro-error",
- "proc-macro2",
- "quote",
- "rustversion",
- "syn 1.0.109",
- "synstructure",
-]
-
 [[package]]
 name = "errno"
 version = "0.3.2"
@@ -1978,7 +1963,7 @@ dependencies = [
 name = "svg-units"
 version = "0.1.0"
 dependencies = [
- "err-derive",
+ "derive_more",
  "lazy_static",
  "regex",
  "strum",
@@ -2019,18 +2004,6 @@ dependencies = [
  "syn 2.0.28",
 ]
 
-[[package]]
-name = "synstructure"
-version = "0.12.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
- "unicode-xid",
-]
-
 [[package]]
 name = "thiserror"
 version = "1.0.47"
diff --git a/Cargo.toml b/Cargo.toml
index 083bd5f..35797e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,3 +1,3 @@
 [workspace]
 members = ["dyesub-tool", "dyesub-cli", "dyesub", "svg-units"]
-resolver = "2"
+resolver = "2"
\ No newline at end of file
diff --git a/dyesub-cli/Cargo.toml b/dyesub-cli/Cargo.toml
index 8c88a67..c32d273 100644
--- a/dyesub-cli/Cargo.toml
+++ b/dyesub-cli/Cargo.toml
@@ -9,4 +9,3 @@ edition = "2021"
 clap = "4.3.23"
 clap_derive = "4.3.12"
 dyesub = { path = "../dyesub" }
-svg-units = { path = "../svg-units" }
\ No newline at end of file
diff --git a/dyesub-cli/src/main.rs b/dyesub-cli/src/main.rs
index 2128824..b34d06b 100644
--- a/dyesub-cli/src/main.rs
+++ b/dyesub-cli/src/main.rs
@@ -1,8 +1,10 @@
+#![feature(path_file_prefix)]
+
 use std::path::PathBuf;
 
 use clap::Parser;
 use clap_derive::Parser;
-use svg_units::SVGMeasure;
+use dyesub::Result;
 
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
@@ -12,15 +14,9 @@ struct Args {
     /// Output SVG path
     #[arg(short, long)]
     output: Option<PathBuf>,
-    /// Page width
-    #[arg(long, default_value="11in")]
-    width: SVGMeasure,
-    /// Page height
-    #[arg(long, default_value="8.5in")]
-    height: SVGMeasure,
 }
 
-fn main() -> dyesub::Result<()> {
+fn main() -> Result<()> {
     let args = Args::parse();
     let output = args.output.unwrap_or_else(|| {
         let mut path = args.input.clone();
diff --git a/flake.nix b/flake.nix
index 3f929a3..dd97bc6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -32,14 +32,18 @@ Updating `cargoHash`:
       };
       # nightly is required for function signal syntax in leptos
       # https://leptos-rs.github.io/leptos/02_getting_started.html
-      rust = pkgs.rust-bin.nightly.latest;
-      # binary for output binary derivations
-      # (doesn't include dev tooling e.g. clippy)
-      rust-bin = rust.minimal;
+      rust-bin = pkgs.rust-bin.nightly.latest.minimal;
+      rust-binWasm = rust-bin.override {
+        targets = [ "wasm32-unknown-unknown" ];
+      };
       rustPlatform = pkgs.makeRustPlatform {
         cargo = rust-bin;
         rustc = rust-bin;
       };
+      rustPlatformWasm = pkgs.makeRustPlatform {
+        cargo = rust-binWasm;
+        rustc = rust-binWasm;
+      };
       rustSettings = with pkgs; {
         src = ./.;
         cargoHash = nixpkgs.lib.fakeHash;
@@ -52,9 +56,8 @@ Updating `cargoHash`:
     in {
       devShells.${system}.default = with pkgs; mkShell {
         packages = [
-          (rust.default.override {
+          (rust-binWasm.override {
             extensions = [ "rust-src" ];
-            targets = [ "wasm32-unknown-unknown" ];
           })
           bacon
         ];
@@ -66,13 +69,13 @@ Updating `cargoHash`:
           pname = "dyesub-cli";
           version = "0.1.0";
           buildAndTestSubdir = "dyesub-cli";
-          cargoHash = "sha256-6nbUjVjroFp2KZEk0wDisCUw2e9GtVxFgsGZm8xEe2A=";
+          cargoHash = "sha256-S4GvLg/B/FxjNyrQyBg25OMTgJVVBwPO+Dy/EFM4WoQ=";
           meta = meta // {
             description = "A tool for generating dye sublimation transfer sheet SVGs for Japanese thumb shift 拇指シフト keycaps.";
           };
         });
         dyesub-tool = let
-          rustToolchain = rust.minimal.override {
+          rustToolchain = pkgs.rust-bin.nightly.latest.minimal.override {
             targets = [ "wasm32-unknown-unknown" ];
           };
           craneLib = ((crane.mkLib pkgs).overrideToolchain rustToolchain).overrideScope' (final: prev: {
diff --git a/svg-units/Cargo.toml b/svg-units/Cargo.toml
index 7891f26..4189723 100644
--- a/svg-units/Cargo.toml
+++ b/svg-units/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-err-derive = "0.3.1"
+derive_more = "0.99.17"
 lazy_static = "1.4.0"
 regex = "1.9.3"
 strum = "0.25.0"
diff --git a/svg-units/src/lib.rs b/svg-units/src/lib.rs
index a911cb2..d2d5fb1 100644
--- a/svg-units/src/lib.rs
+++ b/svg-units/src/lib.rs
@@ -2,7 +2,7 @@ mod unit;
 pub use unit::SVGUnit;
 
 mod measure;
-pub use measure::{SVGMeasure, SVGMeasureParseError};
+pub use measure::SVGMeasure;
 
 #[cfg(test)]
 mod tests;
diff --git a/svg-units/src/measure.rs b/svg-units/src/measure.rs
index 902af66..e9c3afa 100644
--- a/svg-units/src/measure.rs
+++ b/svg-units/src/measure.rs
@@ -1,5 +1,5 @@
 use super::SVGUnit;
-use err_derive::Error;
+use derive_more::From;
 use lazy_static::lazy_static;
 use regex::Regex;
 use std::cmp::Ordering;
@@ -35,18 +35,15 @@ impl SVGMeasure {
     }
 }
 
-#[derive(Debug, Error)]
-pub enum SVGMeasureParseError {
-    #[error(display = "Failed to parse measure number")]
-    ParseMeasure(#[source] ParseFloatError),
-    #[error(display = "Failed to parse measure unit")]
-    ParseUnit(#[source] ParseError),
-    #[error(display = "Invalid measure format")]
+#[derive(From, Debug)]
+pub enum SVGUnitParseError {
+    ParseMeasure(ParseFloatError),
+    ParseUnit(ParseError),
     Invalid,
 }
 
 impl FromStr for SVGMeasure {
-    type Err = SVGMeasureParseError;
+    type Err = SVGUnitParseError;
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         if s == "0" {
             return Ok(SVGMeasure::new(0.0, SVGUnit::Pixel));
@@ -59,19 +56,11 @@ impl FromStr for SVGMeasure {
             let unit = captures[2].parse::<SVGUnit>()?;
             Ok(SVGMeasure::new(measure, unit))
         } else {
-            Err(SVGMeasureParseError::Invalid)
+            Err(SVGUnitParseError::Invalid)
         }
     }
 }
 
-impl<'s> TryFrom<&'s str> for SVGMeasure {
-    type Error = SVGMeasureParseError;
-
-    fn try_from(value: &'s str) -> Result<Self, Self::Error> {
-        Self::from_str(value)
-    }
-}
-
 const EQ_TOLERANCE: f64 = 0.00001;
 
 impl PartialEq for SVGMeasure {