diff --git a/pkgs/development/beam-modules/build-mix.nix b/pkgs/development/beam-modules/build-mix.nix
index 31d266d35784..783ae34dcd38 100644
--- a/pkgs/development/beam-modules/build-mix.nix
+++ b/pkgs/development/beam-modules/build-mix.nix
@@ -29,9 +29,6 @@ let
     MIX_DEBUG = if enableDebugInfo then 1 else 0;
     HEX_OFFLINE = 1;
 
-    # stripping does not have any effect on beam files
-    dontStrip = true;
-
     # add to ERL_LIBS so other modules can find at runtime.
     # http://erlang.org/doc/man/code.html#code-path
     # Mix also searches the code path when compiling with the --no-deps-check flag
@@ -72,6 +69,10 @@ let
       runHook postInstall
     '';
 
+    # stripping does not have any effect on beam files
+    # it is however needed for dependencies with NIFs like bcrypt for example
+    dontStrip = false;
+
     passthru = {
       packageName = name;
       env = shell self;
diff --git a/pkgs/development/beam-modules/build-rebar3.nix b/pkgs/development/beam-modules/build-rebar3.nix
index b66dc535ce03..0dfd68f0993c 100644
--- a/pkgs/development/beam-modules/build-rebar3.nix
+++ b/pkgs/development/beam-modules/build-rebar3.nix
@@ -42,9 +42,13 @@ let
     buildInputs = buildInputs ++ [ erlang rebar3 openssl libyaml ];
     propagatedBuildInputs = unique beamDeps;
 
-    dontStrip = true;
     inherit src;
 
+    # stripping does not have any effect on beam files
+    # it is however needed for dependencies with NIFs
+    # false is the default but we keep this for readability
+    dontStrip = false;
+
     setupHook = writeText "setupHook.sh" ''
       addToSearchPath ERL_LIBS "$1/lib/erlang/lib/"
     '';