diff --git a/decls/haskell_common.bzl b/decls/haskell_common.bzl
index 711a3c2ad..0a9eaa729 100644
--- a/decls/haskell_common.bzl
+++ b/decls/haskell_common.bzl
@@ -83,6 +83,13 @@ def _extra_libraries_arg():
 """),
     }
 
+def _module_prefix_arg():
+    return {
+        "module_prefix": attrs.option(attrs.string(), default = None, doc = """
+    Module prefix if needed
+"""),
+    }
+
 haskell_common = struct(
     srcs_arg = _srcs_arg,
     deps_arg = _deps_arg,
@@ -93,4 +100,5 @@ haskell_common = struct(
     srcs_envs_arg = _srcs_envs_arg,
     use_argsfile_at_link_arg = _use_argsfile_at_link_arg,
     extra_libraries_arg = _extra_libraries_arg,
+    module_prefix_arg = _module_prefix_arg,
 )
diff --git a/decls/haskell_rules.bzl b/decls/haskell_rules.bzl
index 17923f930..f20cc98c1 100644
--- a/decls/haskell_rules.bzl
+++ b/decls/haskell_rules.bzl
@@ -53,6 +53,7 @@ haskell_binary = prelude_rule(
         haskell_common.compiler_flags_arg() |
         haskell_common.deps_arg() |
         haskell_common.scripts_arg() |
+        haskell_common.module_prefix_arg() |
         buck.platform_deps_arg() |
         {
             "contacts": attrs.list(attrs.string(), default = []),
@@ -175,6 +176,7 @@ haskell_library = prelude_rule(
         haskell_common.compiler_flags_arg() |
         haskell_common.deps_arg() |
         haskell_common.scripts_arg() |
+        haskell_common.module_prefix_arg() |
         buck.platform_deps_arg() |
         native_common.link_whole(link_whole_type = attrs.bool(default = False)) |
         native_common.preferred_linkage(preferred_linkage_type = attrs.enum(Linkage.values())) |
diff --git a/haskell/compile.bzl b/haskell/compile.bzl
index 7c85c0d50..3efa4d480 100644
--- a/haskell/compile.bzl
+++ b/haskell/compile.bzl
@@ -124,7 +124,7 @@ def _strip_prefix(prefix, s):
     return stripped if stripped != None else s
 
 
-def _modules_by_name(ctx: AnalysisContext, *, sources: list[Artifact], link_style: LinkStyle, enable_profiling: bool, suffix: str) -> dict[str, _Module]:
+def _modules_by_name(ctx: AnalysisContext, *, sources: list[Artifact], link_style: LinkStyle, enable_profiling: bool, suffix: str, module_prefix: str | None) -> dict[str, _Module]:
     modules = {}
 
     osuf, hisuf = output_extensions(link_style, enable_profiling)
@@ -137,7 +137,10 @@ def _modules_by_name(ctx: AnalysisContext, *, sources: list[Artifact], link_styl
             continue
 
         module_name = src_to_module_name(src.short_path) + bootsuf
-        interface_path = paths.replace_extension(src.short_path, "." + hisuf + bootsuf)
+        if module_prefix:
+            interface_path = paths.replace_extension(module_prefix.replace(".", "/") + "/" + src.short_path, "." + hisuf + bootsuf)
+        else:
+            interface_path = paths.replace_extension(src.short_path, "." + hisuf + bootsuf)
         interface = ctx.actions.declare_output("mod-" + suffix, interface_path)
         interfaces = [interface]
         object_path = paths.replace_extension(src.short_path, "." + osuf + bootsuf)
@@ -832,7 +835,7 @@ def compile(
         pkgname: str | None = None) -> CompileResultInfo:
     artifact_suffix = get_artifact_suffix(link_style, enable_profiling)
 
-    modules = _modules_by_name(ctx, sources = ctx.attrs.srcs, link_style = link_style, enable_profiling = enable_profiling, suffix = artifact_suffix)
+    modules = _modules_by_name(ctx, sources = ctx.attrs.srcs, link_style = link_style, enable_profiling = enable_profiling, suffix = artifact_suffix, module_prefix = ctx.attrs.module_prefix)
 
     haskell_toolchain = ctx.attrs._haskell_toolchain[HaskellToolchainInfo]