diff --git a/rust-bindings/rust/Dockerfile b/rust-bindings/rust/Dockerfile
index 3b0b295e..d09822ba 100644
--- a/rust-bindings/rust/Dockerfile
+++ b/rust-bindings/rust/Dockerfile
@@ -1,5 +1,4 @@
-ARG FEDORA_VER
-FROM fedora:${FEDORA_VER}
+FROM fedora:latest
 
 RUN dnf install -y curl gcc make tar xz 'dnf-command(builddep)'
 RUN dnf builddep -y ostree
diff --git a/rust-bindings/rust/Makefile b/rust-bindings/rust/Makefile
index 1b4f67f9..a5b5b695 100644
--- a/rust-bindings/rust/Makefile
+++ b/rust-bindings/rust/Makefile
@@ -1,6 +1,7 @@
 GIR_REPO := https://github.com/gtk-rs/gir.git
 GIR_VERSION := 2d1ffab19eb5f9a2f0d7a294dbf07517dab4d989
 RUSTDOC_STRIPPER_VERSION := 0.1.13
+OSTREE_VER := 2020.4
 
 all: gir
 
@@ -48,8 +49,7 @@ gir-files:
 
 gir-files/OSTree-1.0.gir:
 	podman build \
-		--build-arg FEDORA_VER=32 \
-		--build-arg OSTREE_VER=2020.4 \
+		--build-arg OSTREE_VER=$(OSTREE_VER) \
 		-t ostree-build \
 		.
 	podman run \
diff --git a/rust-bindings/rust/README.md b/rust-bindings/rust/README.md
index 35ef22e1..eaae430b 100644
--- a/rust-bindings/rust/README.md
+++ b/rust-bindings/rust/README.md
@@ -87,9 +87,18 @@ parts).
 
 CI includes the LGPL docs in the documentation build.
 
-### Updating ostree
-* update the bundled `gir/OSTree-1.0.gir` file
+### Updating glib-rs
+* update `GIR_VERSION` in `Makefile` to the latest gir commit (matching the target glib-rs version)
 * `make gir` to regenerate the generated code
+* inspect differences in generated code
+* update glib-rs dependencies in `Cargo.toml` and `sys/Cargo.toml`
+
+### Updating ostree
+* update `OSTREE_VERSION` in `Makefile`
+* `make update-gir-files` to update all gir files
+* inspect differences in `OSTree-1.0.gir`
+* `make gir` to regenerate the generated code
+* add any new feature levels to `Cargo.toml`
 * update the example feature level in `README.md` in case of a new feature level
 
 ### Releases