I've seen three different issues on Github about this: two in the stack repo for stack users, and one in the yesod repo for a cabal sandbox user: https://github.com/yesodweb/yesod/issues/1020 https://github.com/commercialhaskell/stack/issues/466 https://github.com/commercialhaskell/stack/issues/795 The problem comes down to this: Windows has a limit of 32k on the size of a command string, which can be tripped by GHC's link phase when using a large number of libraries. The ideal situation would be for GHC to have a different way of passing large argument lists to the linker; I don't know how feasible this is, but I wanted to open up a ticket before I started investigating myself in case others have seen this. <details><summary>Trac metadata</summary> | Trac field | Value | | ---------------------- | ------------ | | Version | 7.10.2 | | Type | Bug | | TypeOfFailure | OtherFailure | | Priority | normal | | Resolution | Unresolved | | Component | Compiler | | Test case | | | Differential revisions | | | BlockedBy | | | Related | | | Blocking | | | CC | | | Operating system | | | Architecture | | </details> <!-- {"blocked_by":[],"summary":"Overlong linker arguments on Windows leads to broken builds with confusing error messages","status":"New","operating_system":"","component":"Compiler","related":[],"milestone":"","resolution":"Unresolved","owner":{"tag":"Unowned"},"version":"7.10.2","keywords":[],"differentials":[],"test_case":"","architecture":"","cc":[""],"type":"Bug","description":"I've seen three different issues on Github about this: two in the stack repo for stack users, and one in the yesod repo for a cabal sandbox user:\r\n\r\nhttps://github.com/yesodweb/yesod/issues/1020\r\nhttps://github.com/commercialhaskell/stack/issues/466\r\nhttps://github.com/commercialhaskell/stack/issues/795\r\n\r\nThe problem comes down to this: Windows has a limit of 32k on the size of a command string, which can be tripped by GHC's link phase when using a large number of libraries. The ideal situation would be for GHC to have a different way of passing large argument lists to the linker; I don't know how feasible this is, but I wanted to open up a ticket before I started investigating myself in case others have seen this.","type_of_failure":"OtherFailure","blocking":[]} -->