diff --git a/cabal.project b/cabal.project
index 729f37b45..8f2f10fd1 100644
--- a/cabal.project
+++ b/cabal.project
@@ -45,32 +45,40 @@ source-repository-package
   --sha256: 0q8m8asmb83mpa3j3adlrhc446xif7gv6lql20gv05k33lmbjfhg
 
 -- Wasm workarounds.
+--
+-- We would prefer that these workarounds were not Wasm-dependent;
+-- i.e., that we would use the same version of these dependencies
+-- whether we're building for Wasm or not. However, we *do* make them
+-- Wasm-dependent, because haskell.nix cannot build any of these
+-- source-repository-package dependencies, *nor their reverse
+-- dependencies*, using Nix while in the Nix development shell.
 
--- Upstream requires `happy` at build time, which doesn't work on Wasm
--- targets.
-source-repository-package
-  type: git
-  location: https://github.com/hackworthltd/pretty-show
-  tag: 91d119cb0e3c5f7d866589b25158739580c8fc88
-  --sha256: sha256-mu8Eq0Sg6nCF8C2sXB6ebZcLhz8TVZAbNMiorA7RVc8=
+-- if arch(wasm32)
+--   -- Upstream requires `happy` at build time, which doesn't work on Wasm
+--   -- targets.
+--   source-repository-package
+--     type: git
+--     location: https://github.com/hackworthltd/pretty-show
+--     tag: 91d119cb0e3c5f7d866589b25158739580c8fc88
+--     --sha256: sha256-mu8Eq0Sg6nCF8C2sXB6ebZcLhz8TVZAbNMiorA7RVc8=
 
--- Upstream depends on Posix types unavailable in Wasm.
-source-repository-package
-  type: git
-  location: https://github.com/hackworthltd/semirings
-  tag: 369f696d9d00fe004b16b0de08888fee7a3d08c3
-  --sha256: sha256-kkHCp4Y9IqMXGaDyW5UpsmRjy0ZWZkVSo1nOhpgZUQ0=
+--   -- Upstream depends on Posix types unavailable in Wasm.
+--   source-repository-package
+--     type: git
+--     location: https://github.com/hackworthltd/semirings
+--     tag: 369f696d9d00fe004b16b0de08888fee7a3d08c3
+--     --sha256: sha256-kkHCp4Y9IqMXGaDyW5UpsmRjy0ZWZkVSo1nOhpgZUQ0=
 
--- Upstream uses custom setup, which breaks on Wasm.
-source-repository-package
-  type: git
-  location: https://github.com/cdepillabout/pretty-simple
-  tag: 6fb9b281800ad045925c7344ceb9fd293d86c3b9
-  --sha256: sha256-1gsYj/iznEUCeQ1f5Xk7w54h9FLJSNrIR9V3p4eaRYk=
+--   -- Upstream uses custom setup, which breaks on Wasm.
+--   source-repository-package
+--     type: git
+--     location: https://github.com/cdepillabout/pretty-simple
+--     tag: 6fb9b281800ad045925c7344ceb9fd293d86c3b9
+--     --sha256: sha256-1gsYj/iznEUCeQ1f5Xk7w54h9FLJSNrIR9V3p4eaRYk=
 
--- Upstream doesn't want to support Wasm while it's "experimental."
-source-repository-package
-  type: git
-  location: https://github.com/amesgen/splitmix
-  tag: 83b906c4bcdc2720546f1779a16eb65e8e12ecba
-  --sha256: sha256-sR+Ne56SBzVbPfC7AJeQZn20YDfFwBDpRI873cTm1nU=
+--   -- Upstream doesn't want to support Wasm while it's "experimental."
+--   source-repository-package
+--     type: git
+--     location: https://github.com/amesgen/splitmix
+--     tag: 83b906c4bcdc2720546f1779a16eb65e8e12ecba
+--     --sha256: sha256-sR+Ne56SBzVbPfC7AJeQZn20YDfFwBDpRI873cTm1nU=