Hi, I am trying to make a contribution to the scikit-image documentation. In my attempt to setup the environment after creating it, I keep getting an error(see below). This error happens when I do "pip install -e ." in the cloned scikit-image. I’m doing this on a linux machine. error: Command "gcc -pthread -B /home/liulab/anaconda3/envs/skimage/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/tmp/pip-build-env-29p1x6uy/lib/python3.6/site-packages/numpy/core/include -I/tmp/pip-build-env-29p1x6uy/lib/python3.6/site-packages/numpy/core/include -I/home/liulab/anaconda3/envs/skimage/include/python3.6m -I/home/liulab/anaconda3/envs/skimage/include/python3.6m -c _extrema_cy.c -o build/temp.linux-x86_64-3.6/_extrema_cy.o -MMD -MF build/temp.linux-x86_64-3.6/_extrema_cy.o.d" failed with exit status 1 gcc: error: _extrema_cy.c: No such file or directory gcc: error: _extrema_cy.c: No such file or directory ---------------------------------------- Command "/home/liulab/anaconda3/envs/skimage/bin/python -c "import setuptools, tokenize;__file__='/home/liulab/Documents/scikit-image/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" develop --no-deps" failed with error code 1 in /home/liulab/Documents/scikit-image/ Please advise on what I should do to solve the issue and let me know if you have any questions. Thanks, Sena