/usr/lib/slepcdir/3.4.2/ is in libslepc3.4.2-dbg 3.4.2.dfsg-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/slepcdir/3.4.2/lib/
/usr/lib/slepcdir/3.4.2/lib/libg
/usr/lib/slepcdir/3.4.2/lib/libg_c++
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/SLEPcConfig.cmake
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/configure.log
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/error.log
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/make.log
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/slepcrules
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/conf/slepcvariables
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcconf.h
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcds.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcdsdef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepceps.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcepsdef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcip.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcipdef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcmfn.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcmfndef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcnep.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcnepdef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcqep.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcqepdef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcst.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcstdef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcsvd.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/include/slepcsvddef.mod
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/libslepc.a
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/libslepc.so
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/libslepc.so.3.4.2
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/modules/
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/modules/3.4.2-linux-gnu-c-debug
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/pkgconfig/
/usr/lib/slepcdir/3.4.2/linux-gnu-c-debug/lib/pkgconfig/SLEPc.pc