Caching issue with conditionals in project files

[wz1000]

Describe the bug

There seems to be a cache invalidation issue when there are conditionals in cabal.project files.
Changing the build configuration (eg ghc version) should invaldate the cache but it appears not to.

To Reproduce

Set up a project with 2 packages, one that builds with ghc version A, the other builds with ghc-version B.

Reproducing example here: https://github.com/wz1000/cabal-bug

$ tree
.
├── build92
│   ├── build92.cabal
│   ├── LICENSE
│   └── MyLib.hs
├── build94
│   ├── build94.cabal
│   ├── LICENSE
│   └── MyLib.hs
└── cabal.project
$ cat cabal.project
if impl(ghc >= 9.4)
  packages: ./build94/
if impl(ghc < 9.4)
  packages: ./build92/
$ diff -c1 build92/build92.cabal build94/build94.cabal                                                                                                                                                                                         
*** build92/build92.cabal	2023-02-16 17:29:15.377391010 +0530
--- build94/build94.cabal	2023-02-16 17:34:31.424605778 +0530
***************
*** 1,3 ****
  cabal-version:      3.0
! name:               build92
  version:            0.1.0.0
--- 1,3 ----
  cabal-version:      3.0
! name:               build94
  version:            0.1.0.0
***************
*** 17,19 ****
  library
!     if impl(ghc >= 9.4)
        buildable: False
--- 17,19 ----
  library
!     if impl(ghc < 9.4)
        buildable: False

$ cabal build -w ghc-9.2 all
Resolving dependencies...
Build profile: -w ghc-9.2.6 -O1
In order, the following will be built (use -v for more details):
 - build92-0.1.0.0 (lib) (first run)
Warning: build92.cabal:20:5: Unknown field: import. Common stanza imports
should be at the top of the enclosing section
Configuring library for build92-0.1.0.0..
Preprocessing library for build92-0.1.0.0..
Building library for build92-0.1.0.0..
[1 of 1] Compiling MyLib            ( MyLib.hs, /data/builds/cabal-bug/dist-newstyle/build/x86_64-linux/ghc-9.2.6/build92-0.1.0.0/build/MyLib.o, /data/builds/cabal-bug/dist-newstyle/build/x86_64-linux/ghc-9.2.6/build92-0.1.0.0/build/MyLib.dyn_o )

$ cabal build -w ghc-9.4 all
Resolving dependencies...
Error: cabal: Cannot build all the packages in the project because none of the
components are available to build: the library is marked as 'buildable: False'

$ rm -rf dist-newstyle
$ cabal build -w ghc-9.4 all
Resolving dependencies...
Build profile: -w ghc-9.4.4 -O1
In order, the following will be built (use -v for more details):
 - build94-0.1.0.0 (lib) (first run)
Warning: build94.cabal:20:5: Unknown field: import. Common stanza imports
should be at the top of the enclosing section
Configuring library for build94-0.1.0.0..
Preprocessing library for build94-0.1.0.0..
Building library for build94-0.1.0.0..
[1 of 1] Compiling MyLib            ( MyLib.hs, /data/builds/cabal-bug/dist-newstyle/build/x86_64-linux/ghc-9.4.4/build94-0.1.0.0/build/MyLib.o, /data/builds/cabal-bug/dist-newstyle/build/x86_64-linux/ghc-9.4.4/build94-0.1.0.0/build/MyLib.dyn_o )

Expected behavior

The build -w ghc 9.4 should succeed without having to delete dist-newstyle

System information

• Operating system: Linux
• cabal, ghc versions: cabal-install 3.8.1.0

[Mikolaj]

The reported says that this also reproduces internal-second-prerelease-of-3.10.

[Bodigrim]

Duplicate of #8699, I suppose.