diff --git a/.cargo/config b/.cargo/config
index 584d158f1c..3890df744a 100644
--- a/.cargo/config
+++ b/.cargo/config
@@ -8,3 +8,17 @@ test-gen-wasm = "test -p roc_gen_wasm -p test_gen --no-default-features --featur
 # opt-level=s   Optimizations should focus more on size than speed
 # lto=fat       Spend extra effort on link-time optimization across crates
 rustflags = ["-Copt-level=s", "-Clto=fat"]
+
+[env]
+# Debug flags. Keep this up-to-date with compiler/debug_flags/src/lib.rs.
+# Set = "1" to turn a debug flag on.
+ROC_PRETTY_PRINT_ALIAS_CONTENTS     = "0"
+ROC_PRINT_UNIFICATIONS              = "0"
+ROC_PRINT_MISMATCHES                = "0"
+ROC_VERIFY_RIGID_LET_GENERALIZED    = "0"
+ROC_PRINT_IR_AFTER_SPECIALIZATION   = "0"
+ROC_PRINT_IR_AFTER_RESET_REUSE      = "0"
+ROC_PRINT_IR_AFTER_REFCOUNT         = "0"
+ROC_DEBUG_ALIAS_ANALYSIS            = "0"
+ROC_PRINT_LLVM_FN_VERIFICATION      = "0"
+ROC_PRINT_LOAD_LOG                  = "0"