Package libapr1-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
Package libaprutil1-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libapr1-dev' has no installation candidate
E: Package 'libaprutil1-dev' has no installation candidate