diff --git a/Cargo.toml b/Cargo.toml
index e568b48..7276581 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name        = "ucg"
-version     = "0.1.4"
+version     = "0.1.5"
 authors     = ["Jeremy Wall <jeremy@marzhillstudios.com>"]
 description = "A configuration generation grammar."
 repository  = "https://github.com/zaphar/ucg"
diff --git a/README.md b/README.md
index 526811c..71e5969 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,27 @@ SUBCOMMANDS:
     validate    Check a specific ucg file for errors.
 ```
 
+## compiling a file
+
+```sh
+Compile a specific ucg file.
+
+USAGE:
+    ucg build [OPTIONS] <INPUT> --sym <sym> --target <target>
+
+FLAGS:
+    -h, --help       Prints help information
+    -V, --version    Prints version information
+
+OPTIONS:
+    -o, --out <out>          Output file to write to.
+        --sym <sym>          Specify a specific let binding in the ucg file to output.
+    -t, --target <target>    Target output type. (flags, json, env, exec)
+
+ARGS:
+    <INPUT>    Input ucg file to build.
+```
+
 ## Language Reference
 
 https://docs.rs/ucg/
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index c3b7899..e0c6ca9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -36,7 +36,7 @@ fn do_flags<'a>() -> clap::ArgMatches<'a> {
             (@subcommand build =>
              (about: "Compile a specific ucg file.")
              (@arg sym: --sym +takes_value +required "Specify a specific let binding in the ucg file to output.")
-             (@arg target: --target -t +required +takes_value "Target output type. (flags, json, env)")
+             (@arg target: --target -t +required +takes_value "Target output type. (flags, json, env, exec)")
              (@arg out: --out -o +takes_value "Output file to write to.")
              (@arg INPUT: +required "Input ucg file to build.")
             )