$ nix build ".#pkgsCross.aarch64-multiplatform.qt5.qtsvg"
this derivation will be built:
  /nix/store/mri8dvgmwgjqa1ism4c4c818z8nmxn5s-qtsvg-aarch64-unknown-linux-gnu-5.15.11.drv
building '/nix/store/mri8dvgmwgjqa1ism4c4c818z8nmxn5s-qtsvg-aarch64-unknown-linux-gnu-5.15.11.drv'...
qtsvg-aarch64-unknown-linux-gnu> Error: detected mismatched Qt dependencies:
qtsvg-aarch64-unknown-linux-gnu>     /nix/store/g287i30g2x5qdssmlcifz0g4xhkygpil-qtbase-aarch64-unknown-linux-gnu-5.15.11-dev
qtsvg-aarch64-unknown-linux-gnu>     /nix/store/pgdx2hvksknbfyvkflx0ii43cixsmvqz-qtbase-5.15.11-dev

$ nix why-depends ".#pkgsCross.aarch64-multiplatform.qt5.qtsvg" "/nix/store/g287i30g2x5qdssmlcifz0g4xhkygpil-qtbase-aarch64-unknown-linux-gnu-5.15.11-dev" --derivation
/nix/store/mri8dvgmwgjqa1ism4c4c818z8nmxn5s-qtsvg-aarch64-unknown-linux-gnu-5.15.11.drv
└───/nix/store/h8iwi8ivg7x7vfdsignyvfqpzag8rczs-qtbase-aarch64-unknown-linux-gnu-5.15.11.drv
$ nix why-depends ".#pkgsCross.aarch64-multiplatform.qt5.qtsvg" "/nix/store/pgdx2hvksknbfyvkflx0ii43cixsmvqz-qtbase-5.15.11-dev" --derivation
/nix/store/mri8dvgmwgjqa1ism4c4c818z8nmxn5s-qtsvg-aarch64-unknown-linux-gnu-5.15.11.drv
└───/nix/store/cpgfl1mw4hikicab2ibrham4jwzxxiqj-qmake-hook.drv
    └───/nix/store/3gbpk26qabcr0938n1kss22y7164s1q5-qtbase-5.15.11.drv