diff --git a/simexec/packaging.md b/simexec/packaging.md
new file mode 100644
index 0000000..ec567a5
--- /dev/null
+++ b/simexec/packaging.md
@@ -0,0 +1,50 @@
+# Packaging simexec.c
+
+## License
+
+Simexec is Public Domain so there are basically no barriers when it comes to
+licensing. And if you somehow violate my already-forfeited copyright, I promise
+I won't sue you.
+
+## Files
+
+- `src/simexec`
+	- Can be moved to a system sources directory if it's desirable to keep
+		system sources on hand. Doesn't reference anything else in the
+		repository.
+
+- `simexec.1`
+	- Included manual page for `simexec`. Can be placed in the appropriate
+		manual pages directory. If it displays weirdly and your fix is
+		portable, mail me and I'll probably bring it upstream.
+ 
+- `simexec.c`
+	- A single C file that builds to a single executable, which should be
+		named `simexec`.
+
+- `simexec`
+	- Program binary. Should be placed in a user-accessible binaries
+		directory.
+
+## Dependencies
+
+- `<sysexits.h>`
+	- Ignored if `EX_USAGE` is already defined.
+
+- C standard library
+
+## Compilation
+
+```
+cc -o simexec simexec.c
+```
+
+Or without `<sysexits.h>`:
+
+```
+cc -DEX_USAGE=1 -o simexec simexec.c
+```
+
+## Known packages
+
+- [On the Arch User Repository](https://aur.archlinux.org/packages/simexec-git).
diff --git a/simexec/simexec.c b/simexec/simexec.c
index 069adf4..f8ae7d3 100644
--- a/simexec/simexec.c
+++ b/simexec/simexec.c
@@ -1,7 +1,10 @@
 #include <stdio.h> /* fprintf(3), NULL */
-#include <sysexits.h> /* EX_USAGE */
 #include <unistd.h> /* execv(3), */
 
+#if !defined EX_USAGE
+#	include <sysexits.h> /* EX_USAGE */
+#endif
+
 static char *program_name = "simexec";
 
 int main(int argc, char *argv[]){