Why is dgeev subroutine of lapack undefined? Gives an error on Fortran

I am writing a code on Fortran via the ubuntu terminal. I've used LAPACK dgeev subroutine, but there is an error. I've tried to install lapack, but it seems issue somewhere else

/usr/bin/ld: /tmp/cc8TsQMm.o: in function MAIN__': main.f95:(.text+0xc46): undefined reference to dgeev_' /usr/bin/ld: main.f95:(.text+0xe54): undefined reference to `dgeev_' collect2: error: ld returned 1 exit status

Code is below:

program matrix
    implicit none

    integer :: n, i, j, info, end_file
    complex :: eig_val
    double precision , allocatable :: a(:,:), wr(:), wi(:), vr(:,:), work(:)
            double precision:: dummy(1,1)
    intrinsic :: cmplx, max,nint


    n = 0
    open (unit =1, file = "matrix.txt")
    do
        read(1, *, iostat = end_file)
        IF (end_file /= 0) EXIT
        n = n + 1
    end do

    Allocate(a(n,n), vr(n,n), wr(n), wi(n))

    Rewind(1)
    Read(1,*) a
    a = transpose(a)

    Call dgeev('N', 'V', n, a, n, wr, wi, dummy, 1, vr, n, dummy, -1, info)

    lwork = max((64+2)*n, nint(dummy(1,1)))
    allocate(work(lwork))
        
    Call dgeev('N', 'V', n, a, n, wr, wi, dummy,1, vr, n, work, lwork, info)

    do j = 1,n
        eig_val = complex (wr(j), wi(j))
        Write(*,*) "Eigenvalue", j, ":", eig_val
        Write(*,*) "    Its eigenvector: [", vr(j,:), "]"
    end do

end program