Fix scipy build issue.

singularity/Makefile

@@ -18,4 +18,4 @@ install: run_pipeline
 
 # Should depend on the rest of the repository.
 run_pipeline: run_pipeline.def
-	sudo singularity build run_pipeline run_pipeline.def
+	nohup sh -c "yes | sudo singularity build run_pipeline run_pipeline.def > build.err 2>&1" &

singularity/run_pipeline.def

@@ -80,6 +80,8 @@ From:python:3.7-buster
 	# To avoid using python things installed in the HOME of root
 	# (that will be mounted during singularity build)
 	export PYTHONNOUSERSITE=1
+	# To get scipy properly built as requirement:
+	python3.7 -m pip install pybind11
 	# Needed to manually cythonize custom pybedtools before installing it
 	#/usr/bin/env python3 -m pip install Cython
 	#/usr/bin/env python3 -m pip install --global-option="cythonize" git+https://github.com/blaiseli/pybedtools.git@fix_missing_headers
@@ -96,6 +98,9 @@ From:python:3.7-buster
 	cd bioinfo_utils
 	git submodule update --init --remote --merge
 	has_requirements=$(find . -name requirements.txt -print | xargs dirname)
+	# Needed for scipy (https://stackoverflow.com/a/58534155/1878788)
+	# No, does not solve the issue...
+	# apt install -y gfortran
 	for dir in ${has_requirements}
 	do
 		(cd ${dir} && pip install -r requirements.txt)