diff --git a/pkgs/applications/networking/mailreaders/alpine/default.nix b/pkgs/applications/networking/mailreaders/alpine/default.nix
index 87e824a977d..03c2c21aed0 100644
--- a/pkgs/applications/networking/mailreaders/alpine/default.nix
+++ b/pkgs/applications/networking/mailreaders/alpine/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   };
   configureFlags = [
     "--with-ssl-include-dir=${openssl}/include/openssl"
-    "--with-tcl-lib=tcl8.5"
+    "--with-tcl-lib=${tcl.libPrefix}"
     ];
   preConfigure = ''
     export NIX_LDFLAGS="$NIX_LDFLAGS -lgcc_s"
diff --git a/pkgs/applications/networking/mailreaders/realpine/default.nix b/pkgs/applications/networking/mailreaders/realpine/default.nix
index 11097672ae7..c1835992158 100644
--- a/pkgs/applications/networking/mailreaders/realpine/default.nix
+++ b/pkgs/applications/networking/mailreaders/realpine/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   };
   configureFlags = [
     "--with-ssl-include-dir=${openssl}/include/openssl"
-    "--with-tcl-lib=tcl8.5"
+    "--with-tcl-lib=${tcl.libPrefix}"
     ];
   preConfigure = ''
     export NIX_LDFLAGS="$NIX_LDFLAGS -lgcc_s"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6fb12b7526a..287c5160fe0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10125,8 +10125,12 @@ let
 
   alock = callPackage ../misc/screensavers/alock { };
 
-  alpine = callPackage ../applications/networking/mailreaders/alpine {};
-  realpine = callPackage ../applications/networking/mailreaders/realpine {};
+  alpine = callPackage ../applications/networking/mailreaders/alpine {
+    tcl = tcl-8_5;
+  };
+  realpine = callPackage ../applications/networking/mailreaders/realpine {
+    tcl = tcl-8_5;
+  };
 
   ams-lv2 = callPackage ../applications/audio/ams-lv2 { };