coin3d 4.0.0 no longer builds on nixos-unstable

[kneitinger]

Describe the bug
When installing the coin3d package, the build fails with error:

<PRIOR OUTPUT OMITTED>
-- Performing Test HAVE_HASH_QUOTING - Success
-- Performing Test DISABLE_WARNING_TAUTOLOGCOMPARE
-- Performing Test DISABLE_WARNING_TAUTOLOGCOMPARE - Success
-- Configuring done
CMake Error: install(EXPORT "Coin" ...) includes target "Coin" more than once in the export set.
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    BUILD_TESTING
    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_POLICY_DEFAULT_CMP0025


CMake Generate step failed.  Build files cannot be regenerated correctly.

To Reproduce
Steps to reproduce the behavior:

1. Use nixos-unstable channel
2. nix-shell -p pkgs.coin3d, or any other method of build/installation

Expected behavior
coin3d can be installed explicitly or as a dependency.

Additional context
I encountered this issue while attempting to install freecad. Curiously, I had installed freecad last week with no issues, and neither coin3d nor freecad have been modified since late September and October, respectively.

Notify maintainers
@gebner @viric

Metadata
Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

 - system: `"x86_64-linux"`
 - host os: `Linux 5.9.12, NixOS, 21.03pre257339.83cbad92d73 (Okapi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.9`
 - channels(leaf): `""`
 - channels(root): `"nixos-21.03pre257339.83cbad92d73, nixos-hardware"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:

[jonringer]

related: awslabs/aws-c-common#734

[jonringer]

we should probably patch in https://gitlab.kitware.com/cmake/cmake/-/merge_requests/5556