diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index b1324b1..5aaf59e 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -8,8 +8,8 @@ ENV DISPLAY=:0
 RUN apt install -y build-essential git
 RUN apt install -y chicken-bin
 
-# Install chicken dependencies
-RUN chicken-install srfi-99 srfi-1 srfi-113 srfi-69 csm srfi-78
+# Install chicken tools
+RUN chicken-install beaker csm
 
 # Install raylib
 RUN apt install -y libasound2-dev libx11-dev libxrandr-dev libxi-dev libgl1-mesa-dev libglu1-mesa-dev libxcursor-dev libxinerama-dev libwayland-dev libxkbcommon-dev
@@ -18,4 +18,5 @@ cd raylib/src/ && \
 make PLATFORM=PLATFORM_DESKTOP && \
 make install
 
-RUN chicken-install raylib
\ No newline at end of file
+# Install egg dependencies
+RUN chicken-install -from-list deps.lock
\ No newline at end of file
diff --git a/COLLABORATION.org b/COLLABORATION.org
index ae7ef8b..36a7956 100644
--- a/COLLABORATION.org
+++ b/COLLABORATION.org
@@ -11,6 +11,12 @@ Once both of the above are installed, the devcontainer can be started with ~devc
 
 Once the devcontainer is running, enter it with ~devcontainer exec --workspace-folder . bash~. This will put you at the repository root.
 
+* Dependencies
+The ~deps.lock~ file contains the versions of eggs used in this repository. They can be installed with ~chicken-install -from-list deps.lock~.
+
+* Collaborating with Emacs
+The ~.dir-locals.el~ file automatically sets the Geiser Scheme implementation to Chicken, for any Scheme source file in this directory.
+
 * Running Tests & Samples
 From the ~build~ directory, run ~csm -program <module> ..~ to build a particular module, the ~./<module>~ to run it.
 
diff --git a/deps.lock b/deps.lock
new file mode 100644
index 0000000..5740b68
--- /dev/null
+++ b/deps.lock
@@ -0,0 +1,14 @@
+("raylib" "1.2.0")
+("srfi-1" "0.5.1")
+("r7rs" "1.0.12")
+("srfi-69" "0.4.3")
+("matchable" "1.2")
+("srfi-113" "2.0.0")
+("foreigners" "1.5")
+("srfi-99" "1.4.5")
+("srfi-14" "0.2.1")
+("miscmacros" "1.0")
+("srfi-78" "0.5")
+("srfi-42" "1.76")
+("srfi-128" "0.11")
+("srfi-13" "0.3.4")