diff --git a/backfill_corrections/Makefile b/backfill_corrections/Makefile
index 1d6a3dbed..7f8129bdc 100644
--- a/backfill_corrections/Makefile
+++ b/backfill_corrections/Makefile
@@ -5,9 +5,9 @@ SHELL:=/bin/bash
 OPTIONS=
 
 PYTHON:=env/bin/python
-USR_INPUT_DIR=$(shell $(PYTHON) -m delphi_utils get input_dir)
-USR_CACHE_DIR=$(shell $(PYTHON) -m delphi_utils get cache_dir)
-USR_EXPORT_DIR=$(shell $(PYTHON) -m delphi_utils get export_dir)
+USR_INPUT_DIR:=$(shell $(PYTHON) -m delphi_utils get input_dir)
+USR_CACHE_DIR:=$(shell $(PYTHON) -m delphi_utils get cache_dir)
+USR_EXPORT_DIR:=$(shell $(PYTHON) -m delphi_utils get export_dir)
 
 # Gurobi license
 GRB_LICENSE_FILE=./gurobi.lic
@@ -53,7 +53,7 @@ install-python:
 	python3 -m venv env
 	source env/bin/activate && \
 	pip install wheel && \
-	pip install delphi_utils
+	pip install --timeout 1000 delphi_utils
 
 lib:
 	R -e 'roxygen2::roxygenise("delphiBackfillCorrection")'