diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index 1f71baaeb5d..d2dc9a8c637 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -73,9 +73,6 @@ stdenv.mkDerivation rec {
   # internal pcre would only add <200kB, but it's relatively common
   configureFlags = [ "--with-pcre=system" ]
     ++ optional stdenv.isDarwin "--disable-compile-warnings"
-    # glibc inclues GNU libiconv, but Darwin's iconv function is good enonugh.
-    ++ optional (stdenv.hostPlatform.libc != "glibc" && !stdenv.hostPlatform.isDarwin)
-      "--with-libiconv=gnu"
     ++ optional stdenv.isSunOS "--disable-dtrace"
     # Can't run this test when cross-compiling
     ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform)
diff --git a/pkgs/tools/misc/man-db/default.nix b/pkgs/tools/misc/man-db/default.nix
index eadb736aeeb..8d0728b7556 100644
--- a/pkgs/tools/misc/man-db/default.nix
+++ b/pkgs/tools/misc/man-db/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  doCheck = true;
+  doCheck = !stdenv.hostPlatform.isMusl; /* iconv binary */
 
   meta = with stdenv.lib; {
     homepage = http://man-db.nongnu.org;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 91e81361f69..b301a8a4ff7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9977,7 +9977,7 @@ with pkgs;
   # We also provide `libiconvReal`, which will always be a standalone libiconv,
   # just in case you want it regardless of platform.
   libiconv =
-    if hostPlatform.libc == "glibc"
+    if (hostPlatform.libc == "glibc" || hostPlatform.libc == "musl")
       then glibcIconv (if hostPlatform != buildPlatform
                        then libcCross
                        else stdenv.cc.libc)