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-rw-r--r--subx/Readme.md5
1 files changed, 3 insertions, 2 deletions
diff --git a/subx/Readme.md b/subx/Readme.md
index 2107bd96..43d0730d 100644
--- a/subx/Readme.md
+++ b/subx/Readme.md
@@ -8,6 +8,9 @@ SubX is a simple, minimalist stack for programming your computer.
   $ ./subx  # print out a help message
   ```
 
+It requires a Unix-like environment with a C++ compiler (Linux or BSD or Mac
+OS). Running `subx` will transparently compile it as necessary.
+
 [![Build Status](https://api.travis-ci.org/akkartik/mu.svg)](https://travis-ci.org/akkartik/mu)
 
 You can generate native ELF binaries with it that run on a bare Linux
@@ -343,8 +346,6 @@ runnable on a Linux system running on Intel x86 processors, either 32- or
 
 ## Running
 
-Running `subx` will transparently compile it as necessary.
-
 `subx` currently has the following sub-commands:
 
 * `subx help`: some helpful documentation to have at your fingertips.