diff --git a/pkgs/development/interpreters/guile/2.0.nix b/pkgs/development/interpreters/guile/2.0.nix
index ef473214c324..9d207f70c0c7 100644
--- a/pkgs/development/interpreters/guile/2.0.nix
+++ b/pkgs/development/interpreters/guile/2.0.nix
@@ -90,14 +90,6 @@ builder rec {
     })
   ];
 
-  # Explicitly link against libgcc_s, to work around the infamous
-  # "libgcc_s.so.1 must be installed for pthread_cancel to work".
-
-  # don't have "libgcc_s.so.1" on darwin
-  LDFLAGS = lib.optionalString (
-    !stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isMusl
-  ) "-lgcc_s";
-
   configureFlags = [
     "--with-libreadline-prefix"
   ]
@@ -118,6 +110,12 @@ builder rec {
 
   env = {
     NIX_CFLAGS_COMPILE = "-std=gnu17";
+  }
+  // lib.optionalAttrs (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isMusl) {
+    # Explicitly link against libgcc_s, to work around the infamous
+    # "libgcc_s.so.1 must be installed for pthread_cancel to work".
+    # don't have "libgcc_s.so.1" on darwin
+    LDFLAGS = "-lgcc_s";
   };
 
   postInstall = ''
diff --git a/pkgs/development/interpreters/guile/2.2.nix b/pkgs/development/interpreters/guile/2.2.nix
index 146b29407b30..c48fa78594bd 100644
--- a/pkgs/development/interpreters/guile/2.2.nix
+++ b/pkgs/development/interpreters/guile/2.2.nix
@@ -85,7 +85,9 @@ builder rec {
   # "libgcc_s.so.1 must be installed for pthread_cancel to work".
 
   # don't have "libgcc_s.so.1" on clang
-  LDFLAGS = lib.optionalString (stdenv.cc.isGNU && !stdenv.hostPlatform.isStatic) "-lgcc_s";
+  env = lib.optionalAttrs (stdenv.cc.isGNU && !stdenv.hostPlatform.isStatic) {
+    LDFLAGS = "-lgcc_s";
+  };
 
   configureFlags = [
     "--with-libreadline-prefix=${lib.getDev readline}"
diff --git a/pkgs/development/interpreters/guile/3.0.nix b/pkgs/development/interpreters/guile/3.0.nix
index b0ff7ae3af26..d400a4059cec 100644
--- a/pkgs/development/interpreters/guile/3.0.nix
+++ b/pkgs/development/interpreters/guile/3.0.nix
@@ -100,11 +100,16 @@ builder rec {
     sha256 = "12wvwdna9j8795x59ldryv9d84c1j3qdk2iskw09306idfsis207";
   });
 
-  # Explicitly link against libgcc_s, to work around the infamous
-  # "libgcc_s.so.1 must be installed for pthread_cancel to work".
-
-  # don't have "libgcc_s.so.1" on clang
-  LDFLAGS = lib.optionalString (stdenv.cc.isGNU && !stdenv.hostPlatform.isStatic) "-lgcc_s";
+  env = {
+    # Fix build with gcc15
+    NIX_CFLAGS_COMPILE = toString [ "-std=gnu17" ];
+  }
+  // lib.optionalAttrs (stdenv.cc.isGNU && !stdenv.hostPlatform.isStatic) {
+    # Explicitly link against libgcc_s, to work around the infamous
+    # "libgcc_s.so.1 must be installed for pthread_cancel to work".
+    # don't have "libgcc_s.so.1" on clang
+    LDFLAGS = "-lgcc_s";
+  };
 
   configureFlags = [
     "--with-libreadline-prefix=${lib.getDev readline}"
@@ -126,9 +131,6 @@ builder rec {
   #  https://github.com/NixOS/nixpkgs/pull/160051#issuecomment-1046193028
   ++ lib.optional (stdenv.hostPlatform.isDarwin) "--disable-lto";
 
-  # Fix build with gcc15
-  env.NIX_CFLAGS_COMPILE = toString [ "-std=gnu17" ];
-
   postInstall = ''
     wrapProgram $out/bin/guile-snarf --prefix PATH : "${gawk}/bin"
   ''