diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 84a35340d60a..04209b9e16f5 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -93217,7 +93217,7 @@ self: {
      }) {inherit (pkgs) gtk3;};
 
   "gi-gdkpixbuf" = callPackage
-    ({ mkDerivation, base, bytestring, Cabal, containers, gdk_pixbuf
+    ({ mkDerivation, base, bytestring, Cabal, containers, gdk-pixbuf
      , gi-gio, gi-glib, gi-gobject, haskell-gi, haskell-gi-base
      , haskell-gi-overloading, text, transformers
      }:
@@ -93230,13 +93230,13 @@ self: {
          base bytestring containers gi-gio gi-glib gi-gobject haskell-gi
          haskell-gi-base haskell-gi-overloading text transformers
        ];
-       libraryPkgconfigDepends = [ gdk_pixbuf ];
+       libraryPkgconfigDepends = [ gdk-pixbuf ];
        description = "GdkPixbuf bindings";
        license = stdenv.lib.licenses.lgpl21;
-     }) {inherit (pkgs) gdk_pixbuf;};
+     }) {inherit (pkgs) gdk-pixbuf;};
 
   "gi-gdkpixbuf_2_0_22" = callPackage
-    ({ mkDerivation, base, bytestring, Cabal, containers, gdk_pixbuf
+    ({ mkDerivation, base, bytestring, Cabal, containers, gdk-pixbuf
      , gi-gio, gi-glib, gi-gobject, haskell-gi, haskell-gi-base
      , haskell-gi-overloading, text, transformers
      }:
@@ -93251,11 +93251,11 @@ self: {
          base bytestring containers gi-gio gi-glib gi-gobject haskell-gi
          haskell-gi-base haskell-gi-overloading text transformers
        ];
-       libraryPkgconfigDepends = [ gdk_pixbuf ];
+       libraryPkgconfigDepends = [ gdk-pixbuf ];
        description = "GdkPixbuf bindings";
        license = stdenv.lib.licenses.lgpl21;
        hydraPlatforms = stdenv.lib.platforms.none;
-     }) {inherit (pkgs) gdk_pixbuf;};
+     }) {inherit (pkgs) gdk-pixbuf;};
 
   "gi-gdkx11" = callPackage
     ({ mkDerivation, base, bytestring, Cabal, containers, gi-cairo
@@ -184510,7 +184510,7 @@ self: {
 
   "poppler" = callPackage
     ({ mkDerivation, array, base, bytestring, Cabal, cairo, containers
-     , gdk_pixbuf, glib, gtk, gtk2, gtk2hs-buildtools, mtl, pango
+     , gdk-pixbuf, glib, gtk, gtk2, gtk2hs-buildtools, mtl, pango
      , poppler
      }:
      mkDerivation {
@@ -184522,13 +184522,13 @@ self: {
        libraryHaskellDepends = [
          array base bytestring cairo containers glib gtk mtl
        ];
-       libraryPkgconfigDepends = [ gdk_pixbuf gtk2 pango poppler ];
+       libraryPkgconfigDepends = [ gdk-pixbuf gtk2 pango poppler ];
        libraryToolDepends = [ gtk2hs-buildtools ];
        description = "Binding to the Poppler";
        license = stdenv.lib.licenses.gpl2;
        hydraPlatforms = stdenv.lib.platforms.none;
        broken = true;
-     }) {inherit (pkgs) gdk_pixbuf; inherit (pkgs) gtk2; 
+     }) {inherit (pkgs) gdk-pixbuf; inherit (pkgs) gtk2; 
          inherit (pkgs) pango; inherit (pkgs) poppler;};
 
   "populate-setup-exe-cache" = callPackage