feat: lake: fixedToolchain package configuration#12935
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tydeu merged 2 commits intoleanprover:masterfrom Mar 17, 2026
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feat: lake: fixedToolchain package configuration#12935tydeu merged 2 commits intoleanprover:masterfrom
fixedToolchain package configuration#12935tydeu merged 2 commits intoleanprover:masterfrom
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This PR adds the
fixedToolchainLake package configuration option. Setting this totrueinforms Lake that the package is only expected to function on a single toolchain (like Mathlib). This causes Lake's toolchain update procedure to prioritize its toolchain and avoids the need to separate input-to-output mappings for the package by toolchain version in the Lake cache.