diff --git a/pysr/test/generate_dev_juliapkg.py b/pysr/test/generate_dev_juliapkg.py
index 05f7066b..ac4f6b29 100644
--- a/pysr/test/generate_dev_juliapkg.py
+++ b/pysr/test/generate_dev_juliapkg.py
@@ -9,10 +9,11 @@
 with open(juliapkg_json, "r") as f:
     juliapkg = json.load(f)
 
-del juliapkg["packages"]["SymbolicRegression"]["rev"]
-del juliapkg["packages"]["SymbolicRegression"]["url"]
-juliapkg["packages"]["SymbolicRegression"]["path"] = path_to_srjl
-juliapkg["packages"]["SymbolicRegression"]["dev"] = True
+juliapkg["packages"]["SymbolicRegression"] = {
+    "uuid": juliapkg["packages"]["SymbolicRegression"]["uuid"],
+    "path": path_to_srjl,
+    "dev": True,
+}
 
 with open(juliapkg_json, "w") as f:
     json.dump(juliapkg, f, indent=4)
diff --git a/pysr/test/test_dev_pysr.dockerfile b/pysr/test/test_dev_pysr.dockerfile
index a85e1a5c..3470a7fa 100644
--- a/pysr/test/test_dev_pysr.dockerfile
+++ b/pysr/test/test_dev_pysr.dockerfile
@@ -33,8 +33,6 @@ ADD ./pysr/_cli/*.py /pysr/pysr/_cli/
 
 RUN mkdir /pysr/pysr/test
 
-RUN pip3 install --no-cache-dir .
-
 # Now, we create a custom version of SymbolicRegression.jl
 # First, we get the version from juliapkg.json:
 RUN python3 -c 'import json; print(json.load(open("/pysr/pysr/juliapkg.json", "r"))["packages"]["SymbolicRegression"]["rev"])' > /pysr/sr_version
@@ -53,5 +51,5 @@ RUN sed -i 's/module SymbolicRegression/module SymbolicRegression\n__test_functi
 ADD ./pysr/test/generate_dev_juliapkg.py /generate_dev_juliapkg.py
 RUN python3 /generate_dev_juliapkg.py /pysr/pysr/juliapkg.json /srjl
 
-# Precompile
-RUN python3 -c 'import pysr'
+# Install and pre-compile
+RUN pip3 install --no-cache-dir . && python3 -c 'import pysr'