diff --git a/extra/glib/build b/extra/glib/build
index 889fa801..a9eae7fd 100755
--- a/extra/glib/build
+++ b/extra/glib/build
@@ -22,7 +22,6 @@ meson \
 ninja -C build
 ninja -C build install
 
-
 # json-glib is a separate package which we build alongside
 # glib (as if they were one and the same). The upstream for
 # json-glib is effectively dead (only translation work) so
@@ -30,6 +29,14 @@ ninja -C build install
 {
     cd json-glib
 
+    # This mess of CFLAGS, etc is needed to point json-glib to
+    # the freshly built glib sources instead of the system's.
+    export PKG_CONFIG_PATH="$1/usr/lib/pkgconfig:$PKG_CONFIG_PATH"
+    export PATH="$1/usr/bin:$PATH"
+    export CFLAGS="$CFLAGS -I$1/usr/include/glib-2.0"
+    export CFLAGS="$CFLAGS -I$1/usr/lib/glib-2.0/include -pthread"
+    export LDFLAGS="$LDFLAGS -L$1/usr/lib/"
+
     meson \
         --prefix=/usr \
         --sysconfdir=/etc \
diff --git a/extra/glib/version b/extra/glib/version
index 55102255..11725f72 100644
--- a/extra/glib/version
+++ b/extra/glib/version
@@ -1 +1 @@
-2.64.2 2
+2.64.2 3