diff --git a/README.md b/README.md
index e323d08..39453e2 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,8 @@ build links matters** — a project that also produces shared objects cannot sim
 | Project | Where `-pie` goes | Why |
 |---|---|---|
 | Node.js | `LDFLAGS` | A default Node build links executables only |
-| Redis, Bun | `LDFLAGS` | Dependencies are static archives |
+| Bun | `LDFLAGS` | Dependencies are static archives |
+| Redis | `REDIS_LDFLAGS` | `LDFLAGS` is reused when linking Redis's test modules |
 | CPython | `LINKFORSHARED` | `LDFLAGS` is reused for stdlib extension `.so` files |
 | PHP | `EXTRA_LDFLAGS_PROGRAM` | PHP's own program-only link variable |
 | PostgreSQL | `LDFLAGS_EX` | Postgres separates `_EX` (executables) from `_SL` (shared libs) |
diff --git a/recipes/dragonfly.pkl b/recipes/dragonfly.pkl
index 714bc46..453174c 100644
--- a/recipes/dragonfly.pkl
+++ b/recipes/dragonfly.pkl
@@ -20,7 +20,10 @@ version {
 env = new {
   [#"CFLAGS"#] = #"-fPIC -fstack-protector-strong"#
   [#"CXXFLAGS"#] = #"-fPIC -fstack-protector-strong"#
-  [#"LDFLAGS"#] = #"-pie -Wl,-z,relro -Wl,-z,now"#
+  // -pie is passed through CMAKE_EXE_LINKER_FLAGS at configure time instead of
+  // LDFLAGS: CMake seeds CMAKE_SHARED_LINKER_FLAGS from LDFLAGS too, so -pie
+  // here would break any shared object the build produces.
+  [#"LDFLAGS"#] = #"-Wl,-z,relro -Wl,-z,now"#
 }
 
 dependencies = new {
diff --git a/recipes/redis.pkl b/recipes/redis.pkl
index 391feda..1f2997e 100644
--- a/recipes/redis.pkl
+++ b/recipes/redis.pkl
@@ -18,8 +18,15 @@ version {
 }
 
 env = new {
+  // Redis builds shared objects as well as executables: its test modules link
+  // with `$(SHOBJ_LDFLAGS) $(LDFLAGS)`, so -pie in LDFLAGS produces
+  // `gcc -shared -pie` and the link dies on an undefined reference to `main`.
+  //
+  // src/Makefile composes FINAL_LDFLAGS = $(LDFLAGS) $(OPT) $(REDIS_LDFLAGS)
+  // and uses it only for the executables, so REDIS_LDFLAGS is where -pie goes.
   [#"CFLAGS"#] = #"-fPIC -fstack-protector-strong"#
-  [#"LDFLAGS"#] = #"-pie -Wl,-z,relro -Wl,-z,now"#
+  [#"LDFLAGS"#] = #"-Wl,-z,relro -Wl,-z,now"#
+  [#"REDIS_LDFLAGS"#] = #"-pie"#
 }
 
 dependencies = new {