diff --git a/pkgs/by-name/uw/uwimap/gcc-14-fix.diff b/pkgs/by-name/uw/uwimap/gcc-14-fix.diff
new file mode 100644
index 000000000000..1cf39630f4b1
--- /dev/null
+++ b/pkgs/by-name/uw/uwimap/gcc-14-fix.diff
@@ -0,0 +1,57 @@
+diff --git a/src/mtest/mtest.c b/src/mtest/mtest.c
+index 69af568..8278c60 100644
+--- a/src/mtest/mtest.c
++++ b/src/mtest/mtest.c
+@@ -39,6 +39,8 @@
+ #include "c-client.h"
+ #include "imap4r1.h"
+ 
++char *gets(char *s);
++
+ /* Excellent reasons to hate ifdefs, and why my real code never uses them */
+ 
+ #ifndef unix
+diff --git a/src/osdep/unix/flocklnx.c b/src/osdep/unix/flocklnx.c
+index ca0112a..f4366ee 100644
+--- a/src/osdep/unix/flocklnx.c
++++ b/src/osdep/unix/flocklnx.c
+@@ -32,6 +32,7 @@
+ #ifndef NFS_SUPER_MAGIC
+ #define NFS_SUPER_MAGIC 0x6969
+ #endif
++#include "flocklnx.h"
+ 
+ int safe_flock (int fd,int op)
+ {
+diff --git a/src/osdep/unix/flocklnx.h b/src/osdep/unix/flocklnx.h
+new file mode 100644
+index 0000000..03a71f7
+--- /dev/null
++++ b/src/osdep/unix/flocklnx.h
+@@ -0,0 +1,2 @@
++
++int safe_flock (int fd,int op);
+diff --git a/src/osdep/unix/os_lnx.h b/src/osdep/unix/os_lnx.h
+index b5f39ff..963765c 100644
+--- a/src/osdep/unix/os_lnx.h
++++ b/src/osdep/unix/os_lnx.h
+@@ -60,6 +60,7 @@
+ #define flock safe_flock
+ 
+ 
++#include "flocklnx.h"
+ #include "env_unix.h"
+ #include "fs.h"
+ #include "ftl.h"
+diff --git a/src/osdep/unix/os_slx.h b/src/osdep/unix/os_slx.h
+index b5f39ff..963765c 100644
+--- a/src/osdep/unix/os_slx.h
++++ b/src/osdep/unix/os_slx.h
+@@ -60,6 +60,7 @@
+ #define flock safe_flock
+ 
+ 
++#include "flocklnx.h"
+ #include "env_unix.h"
+ #include "fs.h"
+ #include "ftl.h"
diff --git a/pkgs/by-name/uw/uwimap/package.nix b/pkgs/by-name/uw/uwimap/package.nix
index 86a6e1b0cee7..7c2095f25959 100644
--- a/pkgs/by-name/uw/uwimap/package.nix
+++ b/pkgs/by-name/uw/uwimap/package.nix
@@ -38,13 +38,27 @@ stdenv.mkDerivation rec {
     # Required to build with newer versions of clang. Fixes call to undeclared functions errors
     # and incompatible function pointer conversions.
     ./clang-fix.patch
+    ./gcc-14-fix.diff
   ];
 
-  postPatch = ''
-    sed -i src/osdep/unix/Makefile -e 's,/usr/local/ssl,${openssl.dev},'
-    sed -i src/osdep/unix/Makefile -e 's,^SSLCERTS=.*,SSLCERTS=/etc/ssl/certs,'
-    sed -i src/osdep/unix/Makefile -e 's,^SSLLIB=.*,SSLLIB=${lib.getLib openssl}/lib,'
-  '';
+  postPatch =
+    ''
+      sed -i src/osdep/unix/Makefile -e 's,/usr/local/ssl,${openssl.dev},'
+      sed -i src/osdep/unix/Makefile -e 's,^SSLCERTS=.*,SSLCERTS=/etc/ssl/certs,'
+      sed -i src/osdep/unix/Makefile -e 's,^SSLLIB=.*,SSLLIB=${lib.getLib openssl}/lib,'
+    ''
+    # utime takes a struct utimbuf rather than an array of time_t[2]
+    # convert time_t tp[2] to a struct utimbuf where
+    # tp[0] -> tp.actime and tp[1] -> tp.modtime, where actime and modtime are
+    # type time_t.
+    + ''
+      sed -i \
+        -e 's/time_t tp\[2]/struct utimbuf tp/' \
+        -e 's/\<tp\[0]/tp.actime/g' \
+        -e 's/\<tp\[1]/tp.modtime/g' \
+        -e 's/\(utime *([-a-z>]*\),tp)/\1,\&tp)/' \
+        src/osdep/unix/{mbx.c,mh.c,mmdf.c,mtx.c,mx.c,tenex.c,unix.c}
+    '';
 
   preConfigure = ''
     makeFlagsArray+=("ARRC=${stdenv.cc.targetPrefix}ar rc")