diff --git a/Makefile b/Makefile
index e0d614d69..1f2e4be4f 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ else
 endif
 
 ifndef ANKI_EXTRA_PIP
-	ANKI_EXTRA_PIP := echo The custom pip command variable ANKI_EXTRA_PIP was not defined...
+	ANKI_EXTRA_PIP := true
 endif
 
 .SHELLFLAGS := -eu -o pipefail -c
diff --git a/README.development b/README.development
index bcc00b127..ce54f4997 100644
--- a/README.development
+++ b/README.development
@@ -60,6 +60,13 @@ folder.
 
 Use 'make clean' to remove some generated files.
 
+Performance
+------------
+
+'make run' builds the Rust libraries in unoptimized debug mode. Before doing
+any performance testing, please make sure you make a release build with
+'make build', and install the resulting .whl files with pip.
+
 PyQt
 -----
 
@@ -80,6 +87,8 @@ $ brew link gettext --force
 Windows users (using Visual Studio)
 ----------
 
+User-contributed instructions for building using Cygwin:
+
 1. Download and install Cygwin and put its `/bin/` directory on your system path.
 1. Install the Cygwin Packages: `apt-cyg install rsync make`
     1. Download `gettext` 0.20.1 or superior and put its `bin` directory on your system path.