install: does not remove path from files #1823
Description
While compiling python3 in nixpkgs I noticed that install does not properly work:
Python uses the similar commands to the following command autogenerated by autoconf to install files:
/store/7rj52iy8gvdwkrca5k35a7i4hhdgf90c-uutils-coreutils-0.0.4/bin/install -c -m 644 ./Lib/unittest/runner.py /nix/store/bg19k3h973swd0745mhhp5snzijz7hx3-python3-3.8.8/lib/python3.8/unittest
but install converts that to a wrong path and then prints that the directory does not exist:
install: error: cannot install './Lib/unittest/runner.py' to '/nix/store/bg19k3h973swd0745mhhp5snzijz7hx3-python3-3.8.8/lib/python3.8/unittest/./Lib/unittest/runner.py': the source path is not an existing regular file
A minimal reproduce is:
mkdir -p Lib/unittest lib/unittest
touch Lib/unittest/runner.py
install ./Lib/unittest/runner.py lib/unittest
install: error: cannot install './Lib/unittest/runner.py' to 'lib/unittest/./Lib/unittest/runner.py': No such file or directory (os error 2)