omit_pragmas flavour transformer broken on master

./hadrian/build -j6 --flavour=default+no_profiled_libs+omit_pragmas

Leads to

Command line: _build/stage0/bin/ghc -Wall -Wcompat -dynamic-too -hisuf hi -osuf o -hcsuf hc -static -hide-all-packages -no-user-package-db '-package-env -' '-package-db _build/stage1/lib/package.conf.d' '-this-unit-id ghc-9.5' '-package-id array-0.5.4.0' '-package-id base-4.17.0.0' '-package-id binary-0.8.9.0' '-package-id bytestring-0.11.3.0' '-package-id containers-0.6.5.1' '-package-id deepseq-1.4.8.0' '-package-id directory-1.3.7.1' '-package-id exceptions-0.10.5' '-package-id filepath-1.4.2.2' '-package-id ghc-boot-9.5' '-package-id ghc-heap-9.5' '-package-id ghci-9.5' '-package-id hpc-0.6.1.0' '-package-id process-1.6.14.0' '-package-id stm-2.5.1.0' '-package-id template-haskell-2.19.0.0' '-package-id terminfo-0.4.1.5' '-package-id time-1.12.2' '-package-id transformers-0.5.6.2' '-package-id unix-2.7.2.2' -i -i/home/matt/ghc-clean/_build/stage1/compiler/build -i/home/matt/ghc-clean/_build/stage1/compiler/build/autogen -i/home/matt/ghc-clean/compiler -Irts/include -I_build/stage1/compiler/build -I_build/stage1/compiler/build/. -Icompiler/. -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/process-1.6.14.0/include -I/nix/store/ab5chvn4w5jim59911kg6fa3rvzjlibr-libffi-3.4.2-dev/include -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/unix-2.7.2.2/include -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/time-1.12.2/include -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/bytestring-0.11.3.0/include -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/base-4.17.0.0/include -I/nix/store/q29rm69241n9czpz7lm77qni9r5w9l2f-gmp-with-cxx-6.2.1-dev/include -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/ghc-bignum-1.3/include -I/nix/store/ab5chvn4w5jim59911kg6fa3rvzjlibr-libffi-3.4.2-dev/include -I/nix/store/r8wy2yvy3ag82z07k53mp9ck69k7lzjv-elfutils-0.186-bin/include -I/home/matt/ghc-clean/_build/stage1/lib/x86_64-linux-ghc-9.5.20220811/rts-1.0.2/include -optP-include -optP_build/stage1/compiler/build/autogen/cabal_macros.h -optP-DHAVE_INTERNAL_INTERPRETER -optP-DCAN_LOAD_DLL -outputdir _build/stage1/compiler/build -fdiagnostics-color=always -Wnoncanonical-monad-instances -optc-Wno-error=inline -optP-Wno-nonportable-include-path -c compiler/GHC/Unit/Home.hs -o _build/stage1/compiler/build/GHC/Unit/Home.o -O2 -H32m -Wall -Wno-name-shadowing -Wnoncanonical-monad-instances -Wnoncanonical-monoid-instances -this-unit-id ghc -XHaskell2010 -XNoImplicitPrelude -XBangPatterns -XScopedTypeVariables -XMonoLocalBinds -XTypeOperators -no-global-package-db -package-db=/home/matt/ghc-clean/_build/stage1/lib/package.conf.d -ghcversion-file=rts/include/ghcversion.h -ghcversion-file=rts/include/ghcversion.h -haddock -Winvalid-haddock -Wno-deprecated-flags -Wcpp-undef -fomit-interface-pragmas
===> Command failed with error code: 1
_build/stage1/compiler/build/GHC/Unit/Types.hi
Rule "SPEC $fEqGenUnit @UnitId":
  Iface id out of scope:  $s$fEqGenUnit
Cannot continue after interface file error
Command failed

Labelling as highest as this blocks development workflow.