diff --git a/Launcher/steam-frame-install.sh b/Launcher/steam-frame-install.sh
index 15c1c5c..8e44f14 100755
--- a/Launcher/steam-frame-install.sh
+++ b/Launcher/steam-frame-install.sh
@@ -26,7 +26,7 @@
 #                     host such as Frame Control's "frame"), or "local" when running on the Frame.
 #                     Without it the game is only built.
 #   --work-dir DIR    where the toolchain, Dawn, the build and the extracted disc live
-#                     (default ~/wiicompiled-frame; about 20 GB)
+#                     (default ~/wiicompiled-frame; about 10 GB, plus 5 for an extracted disc)
 #   --release TAG     the release to build (default: the newest one). Ignored with --source.
 #   --source DIR      build this source tree instead of a release (default when the script runs
 #                     from inside one)
@@ -165,10 +165,10 @@ fi
 note "$jobs parallel compiles"
 
 # Room for the build. A first one (the toolchain, Dawn's source and build, the game's build) takes
-# about 20 GB; later ones reuse Dawn. Extracting a disc image takes about 5 GB more, plus the
+# about 10 GB (measured on a Frame: 8.3 GB with the disc); later ones reuse Dawn. Extracting a disc image takes about 5 GB more, plus the
 # archive's size while one is unpacked. Running out halfway is worse than stopping here.
-need_gb=20
-[[ -f "$work_dir/dawn/package/aurora-dawn.json" ]] && need_gb=5
+need_gb=10
+[[ -f "$work_dir/dawn/package/aurora-dawn.json" ]] && need_gb=3
 if [[ -n "$disc" && -f "$disc" && ! -f "$work_dir/disc/sys/main.dol" ]]; then
     need_gb=$(( need_gb + 5 + $(du -k "$disc" | cut -f1) / 1024 / 1024 ))
 fi
diff --git a/README.md b/README.md
index 6e2adf4..70b9358 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ of it compiling Dawn under emulation; later builds reuse it.
   user password), on the same network as your PC;
 - your own clean PAL `RMCP01` disc of Mario Kart Wii: an ISO, WBFS or RVZ image (WIA, CISO, GCZ
   and NFS work too), as is or in a `.zip` or `.7z`, or a folder you extracted it to;
-- an x86_64 Linux PC with about 20 GB free and 16 GB of memory or more.
+- an x86_64 Linux PC with about 15 GB free and 16 GB of memory or more.
 
 The PC commands below work in bash, zsh and fish.
 
@@ -83,7 +83,7 @@ curl -fsSL https://raw.githubusercontent.com/mitch030504/Wiicompiled_VR_Frame/op
   key answers to that name.
 - Everything it builds lives in `~/wiicompiled-frame` (`--work-dir` to change that): the toolchain,
   Dawn, the source, the extracted disc and the build log, `build.log`. A first build needs about
-  20 GB there, and the script checks for it before starting.
+  10 GB there, plus about 5 GB for your extracted disc; the script checks before starting.
 - It runs as many compiles at once as fit in memory (a quarter of your memory in GB). If the machine
   still freezes, run it again with a lower `--jobs`, such as `--jobs 2`.
 - If it stops for any reason, the same command picks up where it left off.