alienzj [1] filed a deletion request for matlab [2]: loading packages... resolving dependencies... looking for conflicting packages... Packages (1) matlab-9.2.0.556344-3 Total Installed Size: 14088.64 MiB :: Proceed with installation? [Y/n] y (1/1) checking keys in keyring [########################################################################] 100% (1/1) checking package integrity [########################################################################] 100% (1/1) loading package files [########################################################################] 100% (1/1) checking for file conflicts [########################################################################] 100% error: failed to commit transaction (conflicting files) matlab: /usr/bin/mcc exists in filesystem matlab: /usr/bin/mex exists in filesystem Errors occurred, no packages were upgraded. I have use makepkg to create matlab-9.2.0.556344-3-x86_64.pkg.tar, and use sudo pacman -U matlab-9.2.0.556344-3-x86_64.pkg.tar to install it. [1] https://aur.archlinux.org/account/alienzj/ [2] https://aur.archlinux.org/pkgbase/matlab/