update src/README.md. Closes #506

1 files changed, 7 insertions, 18 deletions

diff --git a/src/README.md b/src/README.md
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--- a/src/README.md
+++ b/src/README.md
@@ -1,25 +1,14 @@
 # Source files
 
-The main source file is `Inter.glyphs`, but you can easily generate
-UFOs and work with those instead, if you're using a font editor that does
-not support .glyphs files.
+- `Inter-Roman.glyphspackage` — non-italic designs in [Glyphs](https://glyphsapp.com) format
+- `Inter-Italic.glyphspackage` — italic designs in [Glyphs](https://glyphsapp.com) format
+- `features/` — OpenType feature code. This directory only contains features written by hand. Many additional features are automatically generated by Glyphs and are embedded inside the `.glyphspackage` directories.
 
-For more details on how to work with these source files and how to build
-font files from them, see [CONTRIBUTING.md](../CONTRIBUTING.md).
-
-## Generating designspace and UFO files
+To build inter, make sure you have python3, bash and make installed, then in the repository root, run "make all" to build all \~80 fonts:
 
 ```
-make designspace
+make -j all
 ```
 
-This will generate all masters as UFO files in this (`src`) directory as well
-as accompanying designspace files.
-
-You can now forget about the .glyphs file and simply work with the UFO and
-designspace files, and keep building using `make`.
-
-Note that UFO and designspace files are automatically generated as part of
-the build process, so in practice you can simply run `make` and those files
-will be generated for you.
-
+For more details on how to work with these source files and how to build
+font files from them, see [CONTRIBUTING.md](../CONTRIBUTING.md).