  We apply the covariant derivative expansion of the Coleman-Weinberg potential
to the sfermion sector in the minimal supersymmetric standard model, matching
it to the relevant dimension-6 operators in the standard model effective field
theory at one-loop level. Emphasis is paid to nondegenerate large soft
supersymmetry breaking mass squares, and the most general analytical Wilson
coefficients are obtained for all pure bosonic dimension-6 operators. In
addition to the non-logarithmic contributions, they generally have another
logarithmic contributions. Various numerical results are shown, in particular
the constraints in the large $X_t$ branch reproducing the $125$~GeV Higgs mass
can be pushed to high values to almost completely probe the low stop mass
region at the future FCC-ee experiment, even given the Higgs mass calculation
uncertainty.
